diff --git a/brewman/brewman/static/offline.appcache b/brewman/brewman/static/offline.appcache
index 36a7c834..10f73873 100644
--- a/brewman/brewman/static/offline.appcache
+++ b/brewman/brewman/static/offline.appcache
@@ -1,6 +1,6 @@
 CACHE MANIFEST
       
-# version 2012-12-07.6
+# version 2012-12-07.7
 
 CACHE:
 /partial/404.html
diff --git a/brewman/brewman/static/scripts/payment.js b/brewman/brewman/static/scripts/payment.js
index 89a6be4d..de510f7a 100644
--- a/brewman/brewman/static/scripts/payment.js
+++ b/brewman/brewman/static/scripts/payment.js
@@ -14,17 +14,14 @@ function PaymentCtrl($scope, $location, voucher, ledgers) {
 
     $scope.addJournal = function () {
         var oldJournal = getOldJournal($scope.ledger.LedgerID, this.voucher.Journals);
-        if (typeof oldJournal !== 'undefined') {
-            var amount = (oldJournal.Debit * oldJournal.Amount) + (parseInt($scope.debit) * Number($scope.amount));
-            if (amount < 0) {
-                oldJournal.Debit = -1;
-                oldJournal.Amount = amount * -1;
-            } else {
-                oldJournal.Debit = 1;
-                oldJournal.Amount = amount;
-            }
-        } else {
+        if (typeof oldJournal === 'undefined') {
             this.voucher.Journals.push({Debit:1, Amount:Number($scope.amount), Ledger:$scope.ledger});
+        } else {
+            if (oldJournal.Debit === 1) {
+                oldJournal.Amount = oldJournal.Amount + Number($scope.amount);
+            } else {
+                return;
+            }
         }
         delete $scope.ledger;
         delete $scope.amount;
diff --git a/brewman/brewman/static/scripts/receipt.js b/brewman/brewman/static/scripts/receipt.js
index 623cc22d..2a3cd63c 100644
--- a/brewman/brewman/static/scripts/receipt.js
+++ b/brewman/brewman/static/scripts/receipt.js
@@ -13,17 +13,14 @@ function ReceiptCtrl($scope, $routeParams, $location, voucher, ledgers, Voucher)
 
     $scope.addJournal = function () {
         var oldJournal = getOldJournal($scope.ledger.LedgerID, this.voucher.Journals);
-        if (typeof oldJournal !== 'undefined') {
-            var amount = (oldJournal.Debit * oldJournal.Amount) + (parseInt($scope.debit) * Number($scope.amount));
-            if (amount < 0) {
-                oldJournal.Debit = -1;
-                oldJournal.Amount = amount * -1;
-            } else {
-                oldJournal.Debit = 1;
-                oldJournal.Amount = amount;
-            }
-        } else {
+        if (typeof oldJournal === 'undefined') {
             this.voucher.Journals.push({Debit:-1, Amount:Number($scope.amount), Ledger:$scope.ledger});
+        } else {
+            if (oldJournal.Debit === -1) {
+                oldJournal.Amount = oldJournal.Amount + Number($scope.amount);
+            } else {
+                return;
+            }
         }
         delete $scope.ledger;
         delete $scope.amount;