diff --git a/payapi/src/main/java/com/supwisdom/dlpay/api/domain/TTransactionMain.java b/payapi/src/main/java/com/supwisdom/dlpay/api/domain/TTransactionMain.java
index 8d34d10..5987d59 100644
--- a/payapi/src/main/java/com/supwisdom/dlpay/api/domain/TTransactionMain.java
+++ b/payapi/src/main/java/com/supwisdom/dlpay/api/domain/TTransactionMain.java
@@ -363,7 +363,7 @@
       } else if ("credit".equals(debitOrCredit)) {
         return creditSum;
       } else {
-        return debitSum - creditSum;
+        return creditSum - debitSum;
       }
     } else if (subjno.startsWith("1")) {
       if ("debit".equals(debitOrCredit)) {
@@ -371,7 +371,7 @@
       } else if ("credit".equals(debitOrCredit)) {
         return -creditSum;
       } else {
-        return creditSum - debitSum;
+        return debitSum - creditSum;
       }
     }
     return 0.0;