diff --git a/src/components/05_quotation/ProductItem.vue b/src/components/05_quotation/ProductItem.vue
index aa48269a..aae67bfa 100644
--- a/src/components/05_quotation/ProductItem.vue
+++ b/src/components/05_quotation/ProductItem.vue
@@ -196,9 +196,11 @@ function handleCheck(
 ) {
   const target = data.workerIndex.indexOf(index);
   if (target > -1) {
+    data.amount -= 1;
     data.workerIndex.splice(target, 1);
   } else {
     data.workerIndex.push(index);
+    data.amount += 1;
   }
 }