diff --git a/app/Actions/Dealer/CalculatePurchaseAmountOfCurrentPeriod.php b/app/Actions/Dealer/CalculatePurchaseAmountOfCurrentPeriod.php
index 0396f595..d4d86243 100644
--- a/app/Actions/Dealer/CalculatePurchaseAmountOfCurrentPeriod.php
+++ b/app/Actions/Dealer/CalculatePurchaseAmountOfCurrentPeriod.php
@@ -22,11 +22,9 @@ class CalculatePurchaseAmountOfCurrentPeriod
         $tz = now();
 
         if ($tz->day >= 20) {
-            // 上月20号-当月19号的进货业绩
-            $startAt = $tz->copy()->subMonthNoOverflow()->setDay(20)->startOfDay();
+            $startAt = $tz->setDay(20)->startOfDay();
         } else {
-            // 上上月20号-上月19号的进货业绩
-            $startAt = $tz->copy()->subMonthsNoOverflow(2)->setDay(20)->startOfDay();
+            $startAt = $tz->subMonthNoOverflow()->setDay(20)->startOfDay();
         }
 
         return bcmul($this->calculatePurchaseAmount->handle($dealer, $startAt), '1', 2);