diff --git a/B09_Estimation/B09_Estimation_Edits.py b/B09_Estimation/B09_Estimation_Edits.py
index 47a14b80..155f3348 100644
--- a/B09_Estimation/B09_Estimation_Edits.py
+++ b/B09_Estimation/B09_Estimation_Edits.py
@@ -9,26 +9,49 @@
     되돌리기    고친 값을 지우면 계산값으로 돌아감(B08 집계표 ↺ 와 같은 꼴)
 
 ⚠ 기본 조립은 **안 바꾼다** — 고친 값이 없으면 `cached_build` 그 벌 그대로라 골든셋이 그대로 돈다.
-⚠ 얹지 못한 고친 값(단가표에서 사라진 코드·값 없는 슬롯)은 조용히 버리지 않고 `edit_skipped` 에 남긴다.
+⚠ 얹지 못한 고친 값(단가표에서 사라진 코드·값 없는 슬롯·안 풀리는 식)은 조용히 버리지 않고 `edit_skipped` 에 남긴다.
 
 구획
-    adopted_slots   {자재 코드: 슬롯 번호 1~6}        자재단가대비표 채택 바꾸기(`wM_Boxa`)
+    adopted_slots   {자재 코드: 슬롯 1~6}                          자재단가대비표 채택(`wM_Boxa`)
+    sheet_rows      {"코드|i": {quantity}|{removed}} ·            일위대가·단산 구성행(`wM_Edit_iLWi`)
+                    {"코드|+n": {ref, quantity}}                  줄 더하기(뒤에 붙음)
+    price_basis_q   {"D-코드|i": {q_formula}}                     단가산출 Q 식(`wM_Edit_San`)
+                    — 식은 **명세 13장 식 언어**(B08 구조물도 풀이기 그대로) → 소수 2자리 사사오입 확정 →
+                      새 수량 = 수량 × 옛 Q ÷ 새 Q(몫은 그대로)
 """
 
 from __future__ import annotations
 
 import copy
 import json
+from dataclasses import replace
+from decimal import Decimal, InvalidOperation
 from functools import lru_cache
 from typing import Any
 
-from B09_Estimation.B09_Estimation_PriceBook import PRICE_SLOT_COUNT, PriceKind
+from B09_Estimation.B09_Estimation_PriceBook import (
+    PRICE_SLOT_COUNT,
+    PriceBookError,
+    PriceDetail,
+    PriceKind,
+)
 from B09_Estimation.B09_Estimation_UnitPrice import UnitPriceBuild, cached_build
 
 EDITS_KEY = "edits"
 #: 화면·근거 표기 — B08 구조물도 집계표와 같은 말.
 USER_SOURCE = "user"
-SECTIONS = ("adopted_slots",)
+SECTIONS = ("adopted_slots", "sheet_rows", "price_basis_q")
+#: 구성행을 고칠 수 있는 본표 — 일위대가(B) · 단가산출(D).
+EDITABLE_KINDS = (PriceKind.UNIT_PRICE, PriceKind.PRICE_BASIS)
+#: 줄 더하기로 부를 수 있는 단가표 층.
+ADDABLE_KINDS = (
+    PriceKind.LABOR,
+    PriceKind.MATERIAL,
+    PriceKind.MACHINE_HOURLY,
+    PriceKind.UNIT_PRICE,
+    PriceKind.PRICE_BASIS,
+    PriceKind.LUMPSUM,
+)
 
 
 class EditError(ValueError):
@@ -53,6 +76,55 @@ def edits_key(raw: Any) -> str:
     return json.dumps(edits, sort_keys=True, ensure_ascii=False) if edits else ""
 
 
+def split_key(key: str) -> tuple[str, str]:
+    """`코드|i` · `코드|+n` → (코드, 뒤 조각)."""
+    code, _, tail = key.rpartition("|")
+    return code, tail
+
+
+def _quantity(text: Any) -> Decimal:
+    try:
+        value = Decimal(str(text).replace(",", "").strip())
+    except (InvalidOperation, ValueError) as error:
+        raise EditError(f"수량이 수가 아닙니다: {text}") from error
+    if not value.is_finite() or value < 0:
+        raise EditError(f"수량은 0 이상이어야 합니다: {text}")
+    return value
+
+
+def evaluate_q(formulas: dict[str, str]) -> dict[str, Decimal | str]:
+    """Q 식 여럿을 한 번에 — 명세 13장 식 언어(B08 `evaluate_sheets`, Node 한 벌) · 소수 2자리 사사오입.
+
+    칸마다 값(0 보다 큼) 또는 못 푼 까닭(글). ⚠ 식 풀이를 파이썬으로 다시 짜지 않음(두 벌 금지).
+    """
+    if not formulas:
+        return {}
+    from B08_Quantity.B08_Quantity_Engine_Formula import evaluate_sheets
+
+    keys = list(formulas)
+    rows = [
+        {
+            "seq": index + 1,
+            "name": key,
+            "formula": formulas[key],
+            "destination": "reference",
+            "rounding": {"mode": "round", "digits": 2},
+        }
+        for index, key in enumerate(keys)
+    ]
+    solved = evaluate_sheets([{"rows": rows}])
+    if solved is None:
+        return {key: "식 풀이기(Node)를 못 돌렸습니다" for key in keys}
+    result: dict[str, Decimal | str] = {}
+    for key, row in zip(keys, solved[0]):
+        if row.get("error") or row.get("amount") is None:
+            result[key] = str(row.get("error") or "식 값이 없습니다")
+            continue
+        value = Decimal(str(row["amount"]))
+        result[key] = value if value > 0 else "Q 는 0 보다 커야 합니다"
+    return result
+
+
 def _apply_adopted_slots(build: UnitPriceBuild, values: dict[str, Any]) -> None:
     for code, slot in values.items():
         title = build.book.titles.get(code)
@@ -66,11 +138,89 @@ def _apply_adopted_slots(build: UnitPriceBuild, values: dict[str, Any]) -> None:
         title.adopted_slot = number
 
 
+def _mark(build: UnitPriceBuild, code: str, index: int, **info: Any) -> None:
+    build.edit_rows.setdefault(code, {}).setdefault(index, {}).update(info)
+
+
+def _apply_q(build: UnitPriceBuild, values: dict[str, Any]) -> None:
+    formulas = {
+        key: str(value.get("q_formula") or "")
+        for key, value in values.items()
+        if isinstance(value, dict)
+    }
+    solved = evaluate_q({key: text for key, text in formulas.items() if text})
+    for key, text in formulas.items():
+        code, tail = split_key(key)
+        details = build.book.details.get(code, [])
+        index = int(tail) if tail.isdigit() else -1
+        if not 0 <= index < len(details) or details[index].output is None:
+            build.edit_skipped.append(f"Q 식 {key} — Q 로 선 줄이 아님")
+            continue
+        value = solved.get(key)
+        if not isinstance(value, Decimal):
+            build.edit_skipped.append(f"Q 식 {key} — {value or '식이 비었음'}")
+            continue
+        detail = details[index]
+        details[index] = replace(
+            detail,
+            quantity=detail.quantity * detail.output / value,
+            output=value,
+            note=f"{detail.note} · Q(사용자) = {text} = {value}",
+        )
+        _mark(build, code, index, q_formula=text, was_output=str(detail.output))
+
+
+def _apply_rows(build: UnitPriceBuild, values: dict[str, Any]) -> None:
+    added: list[tuple[str, int, str, Any]] = []
+    for key, value in values.items():
+        code, tail = split_key(key)
+        details = build.book.details.get(code)
+        title = build.book.titles.get(code)
+        if details is None or title is None or title.kind not in EDITABLE_KINDS:
+            build.edit_skipped.append(f"구성행 {key} — 고칠 수 있는 본표가 아님")
+            continue
+        if tail.startswith("+") and tail[1:].isdigit():
+            added.append((code, int(tail[1:]), key, value))
+            continue
+        index = int(tail) if tail.isdigit() else -1
+        if not 0 <= index < len(details) or not isinstance(value, dict):
+            build.edit_skipped.append(f"구성행 {key} — 줄이 없음")
+            continue
+        detail = details[index]
+        if value.get("removed"):
+            details[index] = replace(detail, quantity=Decimal(0))
+            _mark(build, code, index, removed=True, was_quantity=str(detail.quantity), user=True)
+            continue
+        try:
+            quantity = _quantity(value.get("quantity"))
+        except EditError as error:
+            build.edit_skipped.append(f"구성행 {key} — {error}")
+            continue
+        details[index] = replace(detail, quantity=quantity)
+        _mark(build, code, index, was_quantity=str(detail.quantity), user=True)
+    for code, _number, key, value in sorted(added):
+        ref = str((value or {}).get("ref") or "")
+        if ref not in build.book.titles or ref == code:
+            build.edit_skipped.append(f"줄 더하기 {key} — 단가표에 없는 코드 {ref}")
+            continue
+        try:
+            quantity = _quantity((value or {}).get("quantity"))
+        except EditError as error:
+            build.edit_skipped.append(f"줄 더하기 {key} — {error}")
+            continue
+        details = build.book.details[code]
+        details.append(PriceDetail(code, ref, quantity, note="사용자가 더한 줄"))
+        _mark(build, code, len(details) - 1, key=key, added=True, user=True)
+
+
 def apply_edits(build: UnitPriceBuild, edits: dict[str, dict[str, Any]]) -> UnitPriceBuild:
-    """고친 값을 얹은 **새 벌** — 기본 벌(캐시)은 건드리지 않음."""
+    """고친 값을 얹은 **새 벌** — 기본 벌(캐시)은 건드리지 않음. 차례: 채택 → Q 식 → 구성행."""
     edited = copy.deepcopy(build)
     edited.edit_skipped = []
+    edited.edit_rows = {}
     _apply_adopted_slots(edited, edits.get("adopted_slots", {}))
+    _apply_q(edited, edits.get("price_basis_q", {}))
+    _apply_rows(edited, edits.get("sheet_rows", {}))
     return edited
 
 
@@ -83,6 +233,17 @@ def edited_build(args: tuple, key: str) -> UnitPriceBuild:
     return apply_edits(base, json.loads(key))
 
 
+def row_edits(build: UnitPriceBuild, code: str) -> list[dict[str, Any]]:
+    """본표 줄마다 고친 값 표시 — 줄 차례는 상세 줄 차례와 같음(한 줄에 한 칸)."""
+    marks = getattr(build, "edit_rows", {}).get(code, {})
+    details = build.book.details.get(code, [])
+    return [
+        {"key": f"{code}|{index}", "user": False, **marks.get(index, {})}
+        | ({"output": str(detail.output)} if detail.output is not None else {})
+        for index, detail in enumerate(details)
+    ]
+
+
 def validate_change(build: UnitPriceBuild, section: str, key: str, value: Any) -> Any:
     """고친 값 하나를 받기 전 검사 — 받을 수 있는 모양으로 돌려주거나 `EditError`."""
     if section not in SECTIONS:
@@ -95,13 +256,63 @@ def validate_change(build: UnitPriceBuild, section: str, key: str, value: Any) -
         if not 1 <= number <= PRICE_SLOT_COUNT or title.slots[number - 1] is None:
             raise EditError(f"{title.name}: {value}번 원천에 값이 없어 채택할 수 없습니다")
         return number
-    return value
+    code, tail = split_key(key)
+    title = build.book.titles.get(code)
+    if title is None or title.kind not in EDITABLE_KINDS or not isinstance(value, dict):
+        raise EditError(f"고칠 수 있는 본표가 아닙니다: {code}")
+    if section == "price_basis_q":
+        text = str(value.get("q_formula") or "").strip()
+        details = build.book.details.get(code, [])
+        index = int(tail) if tail.isdigit() else -1
+        if not 0 <= index < len(details) or details[index].output is None:
+            raise EditError("Q 로 선 줄이 아니라 Q 식을 고칠 수 없습니다")
+        solved = evaluate_q({key: text}).get(key)
+        if not isinstance(solved, Decimal):
+            raise EditError(f"Q 식을 풀지 못했습니다: {solved}")
+        return {"q_formula": text}
+    if tail.startswith("+"):
+        ref = str(value.get("ref") or "")
+        ref_title = build.book.titles.get(ref)
+        if ref_title is None or ref_title.kind not in ADDABLE_KINDS or ref == code:
+            raise EditError(f"더할 수 없는 코드입니다: {ref}")
+        checked = {"ref": ref, "quantity": str(_quantity(value.get("quantity")))}
+        _check_cycle(build, code, ref)
+        return checked
+    details = build.book.details.get(code, [])
+    index = int(tail) if tail.isdigit() else -1
+    if not 0 <= index < len(details):
+        raise EditError(f"그 본표에 없는 줄입니다: {key}")
+    detail = details[index]
+    if (
+        detail.percent_of_labor is not None
+        or detail.percent_of_material is not None
+        or detail.percent_of_parent is not None
+    ):
+        raise EditError(
+            "비율 줄(제잡비·공구손료·잡품)은 수량으로 고치지 않습니다 — 산출 조건에서 고칩니다"
+        )
+    if value.get("removed"):
+        return {"removed": True}
+    return {"quantity": str(_quantity(value.get("quantity")))}
+
+
+def _check_cycle(build: UnitPriceBuild, code: str, ref: str) -> None:
+    """더한 줄이 돌림 참조를 만들면 거절 — 그 본표를 시험 삼아 풀어 봄."""
+    trial = copy.deepcopy(build.book)
+    trial.details.setdefault(code, []).append(PriceDetail(code, ref, Decimal(1)))
+    try:
+        trial.resolve(code)
+    except PriceBookError as error:
+        raise EditError(f"그 줄을 더하면 단가를 풀 수 없습니다: {error}") from error
 
 
 def merge_changes(
     stored: Any, build: UnitPriceBuild, changes: list[dict[str, Any]]
 ) -> dict[str, dict[str, Any]]:
-    """바꿀 것 여럿을 한 번에 — `value` 가 `None` 이면 그 칸을 지움(↺ 계산값으로)."""
+    """바꿀 것 여럿을 한 번에 — `value` 가 `None` 이면 그 칸을 지움(↺ 계산값으로).
+
+    ⚠ 더한 줄의 수량만 고칠 때(`ref` 없이)는 저장된 `ref` 를 이어 씀.
+    """
     edits = normalize(stored)
     for change in changes:
         section, key = str(change.get("section") or ""), str(change.get("key") or "")
@@ -110,5 +321,9 @@ def merge_changes(
         if change.get("value") is None:
             edits.get(section, {}).pop(key, None)
             continue
-        edits.setdefault(section, {})[key] = validate_change(build, section, key, change["value"])
+        value = change["value"]
+        previous = edits.get(section, {}).get(key)
+        if isinstance(value, dict) and isinstance(previous, dict) and "ref" in previous:
+            value = {**previous, **value}
+        edits.setdefault(section, {})[key] = validate_change(build, section, key, value)
     return normalize(edits)
diff --git a/B09_Estimation/B09_Estimation_Expression.py b/B09_Estimation/B09_Estimation_Expression.py
deleted file mode 100644
index e8bab690..00000000
--- a/B09_Estimation/B09_Estimation_Expression.py
+++ /dev/null
@@ -1,84 +0,0 @@
-"""B09 — 사용자가 글로 넣은 **식**을 안전하게 셈 (PLAN 12장 2차 ③ · STmate `wM_Edit_San` 함수 칸).
-
-받는 것 — 수 · `+ - * /` · 괄호 · 함수 넷 `ROUND(x, n)` · `ROUNDDOWN(x, n)` · `INT(x)` · `SQRT(x)`
-(STmate 식 편집기 함수 목록과 같은 이름 · 명세 13장 식 언어). 이름·속성·호출 모양이 그 밖이면 거절.
-
-⚠ `eval` 을 쓰지 않음 — 파이썬 문법 나무를 한 마디씩 보고 아는 것만 셈.
-⚠ 값은 `Decimal` — 소수를 이진수로 접지 않음(`1/1.175` 는 식 그대로 나눔).
-⚠ 「좌→우 순차」 — 같은 우선순위의 곱·나눗셈은 파이썬 문법 나무가 이미 왼쪽부터 묶음(명세 7장 노임 식과 같음).
-"""
-
-from __future__ import annotations
-
-import ast
-from decimal import ROUND_FLOOR, ROUND_HALF_UP, Decimal, InvalidOperation
-
-_MAX_LENGTH = 400
-
-
-class ExpressionError(ValueError):
-    """식을 셀 수 없음 — 까닭을 사람 말로."""
-
-
-def _places(value: Decimal) -> Decimal:
-    digits = int(value)
-    if digits < 0 or digits > 10:
-        raise ExpressionError("자릿수는 0~10 사이여야 합니다")
-    return Decimal(1).scaleb(-digits)
-
-
-def _call(name: str, args: list[Decimal]) -> Decimal:
-    if name == "ROUND" and len(args) == 2:
-        return args[0].quantize(_places(args[1]), rounding=ROUND_HALF_UP)
-    if name == "ROUNDDOWN" and len(args) == 2:
-        return args[0].quantize(_places(args[1]), rounding=ROUND_FLOOR)
-    if name == "INT" and len(args) == 1:
-        return args[0].to_integral_value(rounding=ROUND_FLOOR)
-    if name == "SQRT" and len(args) == 1:
-        if args[0] < 0:
-            raise ExpressionError("음수의 제곱근은 셀 수 없습니다")
-        return args[0].sqrt()
-    raise ExpressionError(f"모르는 함수이거나 인자 수가 맞지 않습니다: {name}")
-
-
-def _eval(node: ast.AST) -> Decimal:
-    if isinstance(node, ast.Expression):
-        return _eval(node.body)
-    if isinstance(node, ast.Constant) and isinstance(node.value, (int, float)):
-        return Decimal(str(node.value))
-    if isinstance(node, ast.UnaryOp) and isinstance(node.op, (ast.USub, ast.UAdd)):
-        value = _eval(node.operand)
-        return -value if isinstance(node.op, ast.USub) else value
-    if isinstance(node, ast.BinOp) and isinstance(node.op, (ast.Add, ast.Sub, ast.Mult, ast.Div)):
-        left, right = _eval(node.left), _eval(node.right)
-        if isinstance(node.op, ast.Add):
-            return left + right
-        if isinstance(node.op, ast.Sub):
-            return left - right
-        if isinstance(node.op, ast.Mult):
-            return left * right
-        if right == 0:
-            raise ExpressionError("0 으로 나눌 수 없습니다")
-        return left / right
-    if isinstance(node, ast.Call) and isinstance(node.func, ast.Name) and not node.keywords:
-        return _call(node.func.id.upper(), [_eval(arg) for arg in node.args])
-    raise ExpressionError(
-        "식에 쓸 수 없는 글자가 있습니다 — 수·+ - * /·괄호·ROUND·ROUNDDOWN·INT·SQRT 만"
-    )
-
-
-def evaluate(text: str) -> Decimal:
-    """식 글 → 값. 셀 수 없으면 `ExpressionError`."""
-    source = str(text or "").strip().replace("×", "*").replace("÷", "/")
-    if not source:
-        raise ExpressionError("식이 비었습니다")
-    if len(source) > _MAX_LENGTH:
-        raise ExpressionError("식이 너무 깁니다")
-    try:
-        tree = ast.parse(source, mode="eval")
-    except SyntaxError as error:
-        raise ExpressionError(f"식 문법이 맞지 않습니다: {error.msg}") from error
-    try:
-        return _eval(tree)
-    except (InvalidOperation, OverflowError) as error:
-        raise ExpressionError("셀 수 없는 값입니다") from error
diff --git a/B09_Estimation/B09_Estimation_MachineProductivity.py b/B09_Estimation/B09_Estimation_MachineProductivity.py
index 9dd9335a..19be04f2 100644
--- a/B09_Estimation/B09_Estimation_MachineProductivity.py
+++ b/B09_Estimation/B09_Estimation_MachineProductivity.py
@@ -408,6 +408,7 @@ def attach_machine_share(
                 if (sources or {}).get(work_item_code)
                 else ""
             ),
+            output=hourly_output(factors),
         )
         cycle_factors[work_item_code] = factors
         return share * Decimal(100)
diff --git a/B09_Estimation/B09_Estimation_MachineProductivity_Dozer.py b/B09_Estimation/B09_Estimation_MachineProductivity_Dozer.py
index 5c533fa7..6aa9dbd1 100644
--- a/B09_Estimation/B09_Estimation_MachineProductivity_Dozer.py
+++ b/B09_Estimation/B09_Estimation_MachineProductivity_Dozer.py
@@ -429,7 +429,11 @@ def attach_dozer_share(
             continue
         # Q 로 선 장비 줄 — D(단가산출)에 달고 B 는 D 를 1 로 부름(층 차례 X → D → B).
         book.add_output_detail(
-            title_code, hourly_code, dozer_machine_hours_per_unit(factors), factors.formula_text
+            title_code,
+            hourly_code,
+            dozer_machine_hours_per_unit(factors),
+            factors.formula_text,
+            output=dozer_hourly_output(factors),
         )
         return Decimal(100)
     return _ZERO
diff --git a/B09_Estimation/B09_Estimation_ParentSteps.py b/B09_Estimation/B09_Estimation_ParentSteps.py
index ab79c7df..5c01321d 100644
--- a/B09_Estimation/B09_Estimation_ParentSteps.py
+++ b/B09_Estimation/B09_Estimation_ParentSteps.py
@@ -125,7 +125,11 @@ def _add_rock_leaf(build: Any, node: dict[str, Any]) -> None:
         for machine_code, _name in machines:
             # Q 로 선 장비 줄 — D(단가산출)에 달고 B 는 D 를 1 로 부름(층 차례 X → D → B).
             build.book.add_output_detail(
-                title_code, f"X-{machine_code}", Decimal(1) / capacity, f"{note} · {source}"
+                title_code,
+                f"X-{machine_code}",
+                Decimal(1) / capacity,
+                f"{note} · {source}",
+                output=capacity,
             )
         build.variants.setdefault(code, []).append(variant)
     # 표 줄은 다 읽었다 — 남는 것은 치즐뿐(자재 카탈로그가 없어 금액에 안 붙는 알려진 미결).
diff --git a/B09_Estimation/B09_Estimation_PriceBook.py b/B09_Estimation/B09_Estimation_PriceBook.py
index cd245c59..b125dd8e 100644
--- a/B09_Estimation/B09_Estimation_PriceBook.py
+++ b/B09_Estimation/B09_Estimation_PriceBook.py
@@ -182,6 +182,9 @@ class PriceDetail:
     #: ⚠ 원문이 「재료비의 **할증수량 제외**」라 밑수가 **할증 전** 값이어야 하는데, 일위대가
     #:   층의 재료비가 곧 할증 전 값이다(할증은 자재총괄에서 한 번만 — PLAN 8-7 ㉠).
     percent_of_material: Decimal | None = None
+    #: 시공능력 **Q**(소수 2자리 확정 값) — Q 로 선 장비 줄(D)에만. 수량 = 몫 ÷ Q 라 Q 식을 고치면
+    #: 새 수량 = 수량 × 옛 Q ÷ 새 Q(PLAN 12장 2차 ③ · `B09_Estimation_Edits`).
+    output: Decimal | None = None
 
 
 @dataclass
@@ -202,7 +205,12 @@ class PriceBook:
         self.details.setdefault(detail.parent_code, []).append(detail)
 
     def add_output_detail(
-        self, parent_code: str, ref_code: str, quantity: Decimal, note: str = ""
+        self,
+        parent_code: str,
+        ref_code: str,
+        quantity: Decimal,
+        note: str = "",
+        output: Decimal | None = None,
     ) -> str:
         """**시공능력 Q** 로 선 장비 줄 — B 에 바로 안 달고 **D(단가산출)** 에 달고 B 는 D 를 1 로 부름.
 
@@ -222,7 +230,7 @@ class PriceBook:
                 )
             )
             self.add_detail(PriceDetail(parent_code, basis_code, Decimal(1), note="단가산출(Q)"))
-        self.add_detail(PriceDetail(basis_code, ref_code, quantity, note=note))
+        self.add_detail(PriceDetail(basis_code, ref_code, quantity, note=note, output=output))
         return basis_code
 
     def title(self, code: str) -> PriceTitle:
diff --git a/B09_Estimation/B09_Estimation_Router_Edits.py b/B09_Estimation/B09_Estimation_Router_Edits.py
index b239a03b..344293d5 100644
--- a/B09_Estimation/B09_Estimation_Router_Edits.py
+++ b/B09_Estimation/B09_Estimation_Router_Edits.py
@@ -55,6 +55,69 @@ async def get_edits(project_id: UUID) -> JSONResponse:
     )
 
 
+@router.get("/{project_id}/estimation/edits/sheet/{code}")
+async def get_edit_sheet(project_id: UUID, code: str) -> JSONResponse:
+    """호표 본표 + 줄마다 고친 값 표시(`edit`) — 일위대가·단산 구성행 수정·Q 식 편집 화면이 씀.
+
+    본표 모양은 `/unit-prices/{code}` 와 같음(`detail_of`) — 줄 차례가 상세 줄 차례와 같아 칸이 맞음.
+    """
+    from B09_Estimation.B09_Estimation_Edits import EDITABLE_KINDS, row_edits
+    from B09_Estimation.B09_Estimation_PriceBook import PriceBookError
+    from B09_Estimation.B09_Estimation_Router import _build_for, _with_provenance
+    from B09_Estimation.B09_Estimation_UnitPrice import detail_of
+
+    try:
+        build = await _build_for(project_id)
+        body = detail_of(build, code)
+    except PriceBookError as error:
+        return JSONResponse(status_code=404, content={"status": "error", "message": str(error)})
+    except Exception:
+        logger.exception("B09 편집 본표 실패: project_id=%s, code=%s", project_id, code)
+        return JSONResponse(
+            status_code=500,
+            content={"status": "error", "message": "본표를 못 만들었습니다."},
+        )
+    for row, edit in zip(body["rows"], row_edits(build, code)):
+        row["edit"] = edit
+    added = [
+        int(mark["key"].rsplit("|+", 1)[1])
+        for mark in getattr(build, "edit_rows", {}).get(code, {}).values()
+        if "|+" in str(mark.get("key", ""))
+    ]
+    body["editable"] = build.book.title(code).kind in EDITABLE_KINDS
+    body["next_add_key"] = f"{code}|+{max(added, default=0) + 1}"
+    return JSONResponse(content=_with_provenance({"status": "success", **body}))
+
+
+@router.get("/{project_id}/estimation/edits/search")
+async def search_titles(project_id: UUID, q: str = "", parent: str = "") -> JSONResponse:
+    """줄 더하기 고르개 — 단가표 제목을 이름·규격으로 찾음(노임·자재·중기·일위대가·단산·일식)."""
+    from B09_Estimation.B09_Estimation_Edits import ADDABLE_KINDS
+    from B09_Estimation.B09_Estimation_Router import _build_for
+    from B09_Estimation.B09_Estimation_UnitPrice import HOURLY_WAGE_SUFFIX, SOURCE_LABEL
+
+    words = [word for word in q.lower().split() if word]
+    build = await _build_for(project_id)
+    rows = []
+    for code, title in build.book.titles.items():
+        if title.kind not in ADDABLE_KINDS or code == parent or code.endswith(HOURLY_WAGE_SUFFIX):
+            continue
+        text = f"{title.name} {title.spec} {code}".lower()
+        if words and all(word in text for word in words):
+            rows.append(
+                {
+                    "code": code,
+                    "name": title.name,
+                    "spec": title.spec,
+                    "unit": title.unit,
+                    "kind_label": SOURCE_LABEL.get(title.kind, ""),
+                }
+            )
+        if len(rows) >= 40:
+            break
+    return JSONResponse(content={"status": "success", "rows": rows})
+
+
 @router.put("/{project_id}/estimation/edits")
 async def put_edits(project_id: UUID, payload: EditRequest) -> JSONResponse:
     """고친 값 저장 — 칸마다 검사하고(값 없는 슬롯 등은 받지 않음) 구획째 갈아 끼움."""
diff --git a/B09_Estimation/B09_Estimation_Storage.py b/B09_Estimation/B09_Estimation_Storage.py
index 3f75a739..8743737e 100644
--- a/B09_Estimation/B09_Estimation_Storage.py
+++ b/B09_Estimation/B09_Estimation_Storage.py
@@ -128,6 +128,7 @@ def _detail_to_dict(detail: PriceDetail) -> dict[str, Any]:
         "percent_of_material": (
             None if detail.percent_of_material is None else str(detail.percent_of_material)
         ),
+        "output": None if detail.output is None else str(detail.output),
     }
 
 
@@ -144,6 +145,7 @@ def _detail_from_dict(raw: dict[str, Any]) -> PriceDetail:
         percent_of_labor=None if labor_percent is None else Decimal(str(labor_percent)),
         percent_of_labor_target=str(raw.get("percent_of_labor_target") or "expense"),
         percent_of_material=(None if material_percent is None else Decimal(str(material_percent))),
+        output=None if raw.get("output") is None else Decimal(str(raw["output"])),
     )
 
 
diff --git a/B09_Estimation/B09_Estimation_UI_Detail.ts b/B09_Estimation/B09_Estimation_UI_Detail.ts
index caa3a883..e5bb3d05 100644
--- a/B09_Estimation/B09_Estimation_UI_Detail.ts
+++ b/B09_Estimation/B09_Estimation_UI_Detail.ts
@@ -80,7 +80,10 @@ interface EditHooks {
 }
 
 function detailRow(row: DetailRowDto, ctx: B09TabContext, hooks: EditHooks | null): HTMLElement {
-  const tr = el("tr", row.edit?.removed ? "is-removed" : row.edit?.user ? "is-user" : "");
+  const tr = el(
+    "tr",
+    row.edit?.removed ? "is-removed" : row.edit?.user || row.edit?.q_formula ? "is-user" : "",
+  );
   const edit = row.edit;
   const quantityCell =
     hooks && edit && editing && row.unit !== "%" ? el("td") : numberCell(quantity(row.quantity));
diff --git a/B09_Estimation/B09_Estimation_UI_Store.ts b/B09_Estimation/B09_Estimation_UI_Store.ts
index 921145f2..843bdf45 100644
--- a/B09_Estimation/B09_Estimation_UI_Store.ts
+++ b/B09_Estimation/B09_Estimation_UI_Store.ts
@@ -266,11 +266,11 @@ export function loadPriceCompare(projectId: string): Promise<PriceCompareDto> {
   );
 }
 
-/** 호표 본표 — 일위대가(B)·시간당 중기(X)는 `unit-prices`, 단가산출(D)은 `price-basis`.
- *  ⚠ 2차 편집 문(`edits/sheet`)이 서면 B·D 는 그리로 바꿈 — 그때까지 편집 칸은 잠자 있음(`editable` 없음). */
+/** 호표 본표 — 일위대가(B)·단가산출(D)은 편집 문(줄마다 고친 값 표시), 시간당 중기(X)는 `unit-prices`. */
 export function loadDetail(projectId: string, code: string): Promise<DetailDto> {
-  const kind = code.startsWith("D-") ? "price-basis" : "unit-prices";
-  return getJson<DetailDto>(
-    `/projects/${encodeURIComponent(projectId)}/estimation/${kind}/${encodeURIComponent(code)}`,
-  );
+  const path =
+    code.startsWith("B-") || code.startsWith("D-")
+      ? `edits/sheet/${encodeURIComponent(code)}`
+      : `unit-prices/${encodeURIComponent(code)}`;
+  return getJson<DetailDto>(`/projects/${encodeURIComponent(projectId)}/estimation/${path}`);
 }
diff --git a/B09_Estimation/B09_Estimation_UnitPrice.py b/B09_Estimation/B09_Estimation_UnitPrice.py
index fe80c425..2f35994d 100644
--- a/B09_Estimation/B09_Estimation_UnitPrice.py
+++ b/B09_Estimation/B09_Estimation_UnitPrice.py
@@ -978,6 +978,7 @@ def build_unit_prices(
                         f" {capacity['capacity_per_hour']} · {capacity['source_text']}"
                     )
                 ),
+                output=fix2(capacity["capacity_per_hour"]),
             )
             attached_capacity = True
 
diff --git a/resources/tester/test_b09_edits.py b/resources/tester/test_b09_edits.py
index 313f7910..d865ab5b 100644
--- a/resources/tester/test_b09_edits.py
+++ b/resources/tester/test_b09_edits.py
@@ -59,6 +59,87 @@ def test_지우면_계산값으로_돌아가고_캐시_키가_빈다() -> None:
     assert edits_key({"adopted_slots": {"M-1": 1}}) != ""
 
 
+def _book_with_basis() -> UnitPriceBuild:
+    build = _build()
+    book = build.book
+    book.add_title(
+        PriceTitle("L-1", PriceKind.LABOR, "보통인부", slots=[None] * 5 + [Decimal(100000)])
+    )
+    book.add_title(
+        PriceTitle("X-1", PriceKind.MACHINE_BASE, "굴착기", slots=[None] * 5 + [Decimal(55700)])
+    )
+    book.add_detail(PriceDetail("B-1", "L-1", Decimal("0.1")))
+    # D — Q 15.71 로 선 장비 줄(몫 1): 수량 1/15.71
+    book.add_output_detail("B-1", "X-1", Decimal(1) / Decimal("15.71"), "Q 식", Decimal("15.71"))
+    return build
+
+
+def test_구성행_수량을_고치고_빼고_더하면_금액이_다시_서고_지우면_돌아온다() -> None:
+    base = _book_with_basis()
+    before = base.book.resolve("B-1")
+    changes = [
+        {
+            "section": "sheet_rows",
+            "key": "B-1|1",
+            "value": {"quantity": "0.2"},
+        },  # 보통인부 0.1 → 0.2
+        {"section": "sheet_rows", "key": "B-1|0", "value": {"removed": True}},  # 시멘트 뺌
+        {"section": "sheet_rows", "key": "B-1|+1", "value": {"ref": "L-1", "quantity": "0.05"}},
+    ]
+    edits = merge_changes({}, base, changes)
+    edited = apply_edits(base, edits)
+    after = edited.book.resolve("B-1")
+    assert after.material == 0 and after.labor == Decimal(25000)  # 0.2×10만 + 0.05×10만
+    marks = edited.edit_rows["B-1"]
+    assert marks[0]["removed"] and marks[1]["was_quantity"] == "0.1" and marks[3]["added"]
+    assert base.book.resolve("B-1") == before  # 기본 벌 그대로
+    cleared = merge_changes(edits, base, [{**c, "value": None} for c in changes])
+    assert cleared == {} and apply_edits(base, cleared).book.resolve("B-1") == before
+
+
+def test_Q_식을_고치면_수량이_옛_Q_를_새_Q_로_바꾼_만큼_변한다() -> None:
+    base = _book_with_basis()
+    key = "D-1|0"
+    edits = merge_changes(
+        {},
+        base,
+        [
+            {
+                "section": "price_basis_q",
+                "key": key,
+                "value": {"q_formula": "3600*0.2*0.7*0.85*0.55/15*2"},
+            }
+        ],
+    )
+    edited = apply_edits(base, edits)
+    detail = edited.book.details["D-1"][0]
+    assert detail.output == Decimal("31.42")
+    assert detail.quantity == Decimal(1) / Decimal("15.71") * Decimal("15.71") / Decimal("31.42")
+    assert edited.edit_rows["D-1"][0]["q_formula"].startswith("3600")
+    # 줄 0.1원 · 머리 원 미만 절사: 55,700 ÷ 31.42 = 1,772.7 → 1,772
+    assert edited.book.resolve("D-1").expense == Decimal(1772)
+
+
+def test_Q_로_안_선_줄·비율_줄·돌림_참조는_받지_않는다() -> None:
+    base = _book_with_basis()
+    with pytest.raises(EditError):
+        merge_changes(
+            {}, base, [{"section": "price_basis_q", "key": "B-1|1", "value": {"q_formula": "10"}}]
+        )
+    with pytest.raises(EditError):
+        merge_changes(
+            {},
+            base,
+            [{"section": "sheet_rows", "key": "B-1|+1", "value": {"ref": "B-1", "quantity": "1"}}],
+        )
+    with pytest.raises(EditError):
+        merge_changes(
+            {},
+            base,
+            [{"section": "sheet_rows", "key": "D-1|+1", "value": {"ref": "B-1", "quantity": "1"}}],
+        )
+
+
 def test_단가표에서_사라진_코드는_버리지_않고_남긴다() -> None:
     edited = apply_edits(_build(), {"adopted_slots": {"M-없음": 1, "M-1": 2}})
     assert len(edited.edit_skipped) == 2
diff --git a/resources/tester/test_b09_expression.py b/resources/tester/test_b09_expression.py
index 0fe9b956..d24e632b 100644
--- a/resources/tester/test_b09_expression.py
+++ b/resources/tester/test_b09_expression.py
@@ -1,24 +1,35 @@
-"""B09 사용자 식 셈 — Q 식 편집 칸이 받는 식(PLAN 12장 2차 ③ · STmate `wM_Edit_San` 함수)."""
+"""B09 Q 식 편집이 쓰는 식 — **명세 13장 식 언어**(B08 구조물도 풀이기 한 벌)로 풀고 소수 2자리 사사오입.
+
+⚠ 2026-09-14 브레인 판정 — 식 풀이를 B09 에 두 벌 짜지 않음. 종전 `B09_Estimation_Expression`(파이썬 셈)은 걷어냄.
+"""
 
 from __future__ import annotations
 
 from decimal import Decimal
 
-import pytest
-
-from B09_Estimation.B09_Estimation_Expression import ExpressionError, evaluate
+from B09_Estimation.B09_Estimation_Edits import evaluate_q
 
 
-def test_실무_Q_식을_그대로_센다() -> None:
-    # 18번 §2.2 — 3600 × q 0.2 × K 0.7 × f 0.85 × E 0.55 ÷ Cm 15 = 15.708
-    assert evaluate("3600*0.2*0.7*ROUND(1/1.175,2)*0.55/15") == Decimal("15.708")
-    # 울진 대흥 제15호표 되메우기 Q 68.04
-    assert evaluate("ROUND(3600*0.7*0.9*(1/1.25)*0.75/20, 2)") == Decimal("68.04")
-    assert evaluate("INT(7.9) + SQRT(16) - ROUNDDOWN(1.239, 2)") == Decimal("9.77")
-    assert evaluate("60 ÷ 4 × 0.45 × 0.8") == Decimal("5.40")
+def test_실무_Q_식을_명세_13장_언어로_풀고_2자리로_확정한다() -> None:
+    got = evaluate_q(
+        {
+            # 18번 §2.2 — f 는 0.85 로 먼저 확정해 넣음 → 15.708 → 15.71
+            "a": "3600*0.2*0.7*0.85*0.55/15",
+            # 울진 대흥 제15호표 되메우기 Q 68.04
+            "b": "3600*0.7*0.9*(1/1.25)*0.75/20",
+            # 콘크리트믹서 Q = 60 / t × q × E = 5.40
+            "c": "60/4*0.45*0.8",
+            "d": "MAX(12.345, SQRT(100))",
+        }
+    )
+    assert got == {
+        "a": Decimal("15.71"),
+        "b": Decimal("68.04"),
+        "c": Decimal("5.4"),
+        "d": Decimal("12.35"),
+    }
 
 
-@pytest.mark.parametrize("text", ["__import__('os')", "a+1", "1/0", "2**3", "", "ROUND(1)"])
-def test_모르는_글·0_나누기·빈_식은_거절한다(text: str) -> None:
-    with pytest.raises(ExpressionError):
-        evaluate(text)
+def test_모르는_이름·0_이하는_까닭으로_돌려준다() -> None:
+    got = evaluate_q({"x": "abc+1", "y": "0*5", "z": "1/0"})
+    assert all(isinstance(value, str) and value for value in got.values()), got