diff --git a/xml/page_payment_cash.xml b/xml/page_payment_cash.xml
index 78de521a..d56900dd 100644
--- a/xml/page_payment_cash.xml
+++ b/xml/page_payment_cash.xml
@@ -606,7 +606,7 @@
 			Var RemainAmount = RemainAmount - IntVendingCredit
 
 			Var SumCoinAmount = CoinAmount + IntVendingCampaign
-			Var SumCoinAmount = CoinAmount + IntVendingCredit
+			Var SumCoinAmount = SumCoinAmount + IntVendingCredit
 			If SumCoinAmount >= PayAmount Then 
 				;Var VendingQRCode = "ERROR"
 				CoinVending OFF
diff --git a/xml/page_thankyou.xml b/xml/page_thankyou.xml
index 8975baf0..e0f771b8 100644
--- a/xml/page_thankyou.xml
+++ b/xml/page_thankyou.xml
@@ -60,7 +60,7 @@
             If FreeVendingCampaign = 0 Then
                     If IntVendingCampaign < PayAmount Then 
                         Var SumCoinAmount = CoinAmount + IntVendingCampaign
-						Var SumCoinAmount = CoinAmount + IntVendingCredit
+						Var SumCoinAmount = SumCoinAmount + IntVendingCredit
 
                         If SumCoinAmount >= PayAmount Then 
                             Var Canout = SumCoinAmount - PayAmount