diff --git a/app/models/sale_payment.rb b/app/models/sale_payment.rb
index 59cee9a6..0bf80955 100644
--- a/app/models/sale_payment.rb
+++ b/app/models/sale_payment.rb
@@ -55,7 +55,7 @@ class SalePayment < ApplicationRecord
       sale_audit = SaleAudit.record_payment(invoice.id, remark, action_by)
 
       # update complete order items in oqs
-      SaleOrder.where("sale_id = '#{ invoice.sale_id }'").find_each do |sodr|        
+      SaleOrder.where("sale_id = '#{ invoice.sale_id }'").find_each do |sodr|
         AssignedOrderItem.where("order_id = '#{ sodr.order_id }'").find_each do |aoi|
           aoi.delivery_status = 1
           aoi.save
@@ -314,7 +314,7 @@ class SalePayment < ApplicationRecord
       # overall_dis = SaleItem.get_overall_discount(sObj.id)
       overall_dis = sObj.total_discount
 
-   		total_amount = rebate_prices - payparcost + overall_dis
+   		total_amount = rebate_prices - payparcost - overall_dis
       if total_amount > 0
      		receipt_no = sObj.receipt_no
         membership      = MembershipSetting.find_by_membership_type("paypar_url")