diff --git a/src/views/commodity/combination.vue b/src/views/commodity/combination.vue
index 11578f4..caddb78 100644
--- a/src/views/commodity/combination.vue
+++ b/src/views/commodity/combination.vue
@@ -298,7 +298,13 @@ export default {
           val += cost * item.num
         }
       })
-      data.itemInfo.goods_cost = (val / 100).toFixed(2)
+      data.itemInfo.goods_cost = toTwoDecimals(val)
+    }
+
+    function toTwoDecimals(num) {
+      let truncated = Math.floor(num)
+      let result = truncated / 100
+      return result.toFixed(2)
     }
 
     onMounted(() => {