diff --git a/B09_Estimation/B09_Estimation_Sangeun.py b/B09_Estimation/B09_Estimation_Sangeun.py
index 9815913f2..dedd80e90 100644
--- a/B09_Estimation/B09_Estimation_Sangeun.py
+++ b/B09_Estimation/B09_Estimation_Sangeun.py
@@ -208,12 +208,11 @@ class _Prices:
 def _unit(row: dict) -> tuple[str, Decimal]:
     """결과단위 1 단위 — (단위, 배)(「원/10㎡」 = ㎡ · 10) · 알약 규칙(`combo_pills`) 그대로 ·
     줄 = 사본 단가 묶음 것(M01 다시 안 읽음 · 719-2)."""
-    per = combo_store._PER.findall(str(row.get("결과단위") or ""))
+    per = combo_store.mu.per(row.get("결과단위"))  # 712-2 단위 한 벌
     if not per:
         return "", Decimal(1)
-    times = per[0][0].replace(",", "")
     unit = " · ".join(dict.fromkeys(u for _, u in per))
-    return unit, Decimal(times) if len(per) == 1 and times else Decimal(1)
+    return unit, Decimal(per[0][0]) if len(per) == 1 else Decimal(1)
 
 
 def unit_of(whole: Any, code: str) -> str: