diff --git a/B08_Quantity/B08_Quantity_UI_Earthwork.ts b/B08_Quantity/B08_Quantity_UI_Earthwork.ts
index a6f826259..2a82c1051 100644
--- a/B08_Quantity/B08_Quantity_UI_Earthwork.ts
+++ b/B08_Quantity/B08_Quantity_UI_Earthwork.ts
@@ -228,7 +228,11 @@ function totalRow(table: EarthworkTable): HTMLTableRowElement {
     num(t.diverted_m3),
     num(t.balance_m3),
     num(last?.cumulative_m3),
-    ...FACE_KEYS.flatMap((key) => ["", num(t[`${key}_area_m2`])]),
+    // 값이 하나도 없는 칸(제근 — B07 에 값 없음)은 합계도 비움
+    ...FACE_KEYS.flatMap((key) => [
+      "",
+      table.rows.some((row) => row.faces?.[key]?.area_m2 != null) ? num(t[`${key}_area_m2`]) : "",
+    ]),
   ];
   const tr = document.createElement("tr");
   tr.className = "b08-earthwork__total";