edit

app/shop/lib/Sell.php

@@ -895,7 +895,7 @@ class Sell
                         $data['list'][$k]['discount_id'] = $role['id'];
                         $data['discount_goods'][] = $data['list'][$k];
                         $data['discount_id'] = $role['id'];
-                        $data['list'][$k]['discount_cash'] = ($data['list'][$k]['price'] - $data['list'][$k]['discount_cash']) * $n;
+                        $data['list'][$k]['discount_cash'] = ($data['list'][$k]['price'] - $discount_cash) * $n;
                         $data['discount_cash'] += $data['list'][$k]['discount_cash'];
                     }
                 }