0022512: In credit sales the check of Business Partner Available Credit is not being done correctly.

diff --git a/src/org/openbravo/retail/posterminal/CheckBusinessPartnerCredit.java b/src/org/openbravo/retail/posterminal/CheckBusinessPartnerCredit.java
--- a/src/org/openbravo/retail/posterminal/CheckBusinessPartnerCredit.java
+++ b/src/org/openbravo/retail/posterminal/CheckBusinessPartnerCredit.java
@@ -32,7 +32,7 @@
         businessPartnerId);
     BigDecimal creditLimit = businessPartner.getCreditLimit();
     BigDecimal creditUsed = businessPartner.getCreditUsed();
-    BigDecimal actualCredit = creditLimit.add(creditUsed);
+    BigDecimal actualCredit = creditLimit.subtract(creditUsed);
 
     boolean enoughCredit = false;
 
diff --git a/web/org.openbravo.retail.posterminal/js/pointofsale/view/modals/modalcreditsales.js b/web/org.openbravo.retail.posterminal/js/pointofsale/view/modals/modalcreditsales.js
--- a/web/org.openbravo.retail.posterminal/js/pointofsale/view/modals/modalcreditsales.js
+++ b/web/org.openbravo.retail.posterminal/js/pointofsale/view/modals/modalcreditsales.js
@@ -51,7 +51,7 @@
       var bp = this.model.get('order').get('bp');
       var bpCreditUsed = this.model.get('order').get('bp').get('creditUsed');
       var totalPending = this.model.get('order').getPending();
-      bp.set('creditUsed', bpCreditUsed - totalPending);
+      bp.set('creditUsed', bpCreditUsed + totalPending);
       OB.Dal.save(bp, null, error);
     }
   }
diff --git a/web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js b/web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js
--- a/web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js
+++ b/web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js
@@ -344,7 +344,7 @@
       var creditLimit = this.model.get('order').get('bp').get('creditLimit');
       var creditUsed = this.model.get('order').get('bp').get('creditUsed');
       var totalPending = this.model.get('order').getPending();
-      if ((creditLimit + creditUsed) >= totalPending) {
+      if ((creditLimit - creditUsed) >= totalPending) {
         this.doShowPopup({
           popup: 'modalEnoughCredit',
           args: {
@@ -352,7 +352,7 @@
           }
         });
       } else {
-        actualCredit = creditLimit + creditUsed;
+        actualCredit = creditLimit - creditUsed;
         this.doShowPopup({
           popup: 'modalNotEnoughCredit',
           args: {