diff --git a/B08_Quantity/B08_Quantity_UI_Drawing.ts b/B08_Quantity/B08_Quantity_UI_Drawing.ts
index dccc5f357..725ff48fb 100644
--- a/B08_Quantity/B08_Quantity_UI_Drawing.ts
+++ b/B08_Quantity/B08_Quantity_UI_Drawing.ts
@@ -119,6 +119,21 @@ function comboSection(
     return section;
   }
   const source = sourceOf(request.projectId, copy.폴더);
+  // 702-4 B09 원가에서 고친 일위대가 칸(덮개) — 카드 금액 = 사본 셈(고치기 전) · 셈 답 `B09고침` 수
+  const covered = note("");
+  covered.hidden = true;
+  const labor = source.labor;
+  if (labor) {
+    const calc = labor.calc;
+    labor.calc = (...args) =>
+      calc(...args).then((got) => {
+        const n = Number((got as { B09고침?: number }).B09고침) || 0;
+        covered.textContent = `B09 원가에서 고친 일위대가 칸 ${n} — 이 카드 금액은 고치기 전 사본 값 · 원가 금액은 B09`;
+        covered.hidden = !n;
+        return got;
+      });
+  }
+  section.append(covered);
   if (!copy.부분.includes("도면")) section.append(note(L("B08_Quantity_Drawing_NoDrawing")));
   const load = (): void => void cards.load({ id: copy.폴더, label: name });
   // 카드 안 [저장]은 없음(자료 자리에 write 없음) — [수정]만 사본 편집 화면으로(163-3)
diff --git a/M02_MasterTemplete/M02_Project_Items_Router.py b/M02_MasterTemplete/M02_Project_Items_Router.py
index 6f9f780d7..b532cd6e6 100644
--- a/M02_MasterTemplete/M02_Project_Items_Router.py
+++ b/M02_MasterTemplete/M02_Project_Items_Router.py
@@ -219,4 +219,12 @@ async def save_item_as(
 async def calc_item(
     project_id: str, folder: str, session: dict[str, Any] = Depends(verify_session)
 ) -> dict[str, Any]:
-    return await _run(copies.calc, await _root(session, project_id), folder)
+    root = await _root(session, project_id)
+    out = await _run(copies.calc, root, folder)
+    from B09_Estimation.B09_Estimation_Labor_Source import cover_count  # B09 → M02 순환 피함
+
+    try:  # 702-4 B09 원가에서 고친 일위대가 칸 수(카드 금액 = 사본 셈 · 고치기 전)
+        out["B09고침"] = await asyncio.to_thread(cover_count, root, folder)
+    except Exception:  # noqa: BLE001 — 표시만 · 카드 셈은 그대로
+        out["B09고침"] = 0
+    return out