diff --git a/app/controller/api/server/Store.php b/app/controller/api/server/Store.php
index 0f8c6d82..019fb13f 100644
--- a/app/controller/api/server/Store.php
+++ b/app/controller/api/server/Store.php
@@ -118,7 +118,7 @@ class Store extends BaseController
                     if (!empty($userConsumption) && in_array($merchant['type_id'], $item['type_id'])) {
                         $nextItem = $consumption['config'][$k + 1] ?? $item;
                         $saleTarget = $nextItem['amount'];
-                        $subsidyAmount = $item['subsidy'];
+                        $subsidyAmount = $nextItem['subsidy'];
                         $purchaseTarget = bcmul($saleTarget, 0.5, 2);
                         break;
                     }