数据中心->财务概况->充值记录，增加退款总金额的统计

app/Admin/Controllers/DataCenter/FinancialOverview.php

@@ -30,6 +30,9 @@ class FinancialOverview
                 $row->column(3, function (Column $column) {
                     $column->append(infoBox('收入总金额', 'dropbox', '/admin/deliver?status=1', 'green', FinancialSta::getTotalIncome()));
                 });
+                $row->column(3, function (Column $column) {
+                    $column->append(infoBox('退款总金额', 'dropbox', '/admin/deliver?status=1', 'green', FinancialSta::getTotalRefund()));
+                });
                 $row->column(3, function (Column $column) {
                     $column->append(infoBox('用户充值总金额', 'dropbox', '/admin/deliver?status=1', 'green', FinancialSta::getTotalRecharge()));
                 });

app/Admin/Controllers/DataCenter/FinancialSta.php

@@ -32,6 +32,11 @@ class FinancialSta
         $data /= 100;
         return $data;
     }
+    public static function getTotalRefund(){
+        $data = Order::where('payment_status',4)->pluck('payment_amount')->sum();
+        $data /= 100;
+        return $data;
+    }
     /*
      * 充值记录
      * */