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app/models/sale.rb

@@ -371,6 +371,8 @@ class Sale < ApplicationRecord
     end
     #compute rounding adjustment
     # adjust_rounding
+    sale.rounding_adjustment = compute_adjust_rounding(sale.grand_total)
+
     sale.save!
 
   end
@@ -552,6 +554,26 @@ class Sale < ApplicationRecord
     
   end
 
+  def compute_adjust_rounding(grand_total)
+    shop_details =  Shop::ShopDetail 
+      # rounding adjustment
+    if shop_details.is_rounding_adj
+      a = grand_total % 25 # Modulus
+      b = grand_total / 25 # Division
+      #not calculate rounding if modulus is 0 and division is even
+      #calculate rounding if modulus is zero or not zero and division are not even
+      if (a != 0.0 && b%2 != 0.0) || (a==0.0 && b%2 !=0)
+        new_total    = Sale.get_rounding_adjustment(grand_total)
+        rounding_adjustment = new_total - grand_total
+      else
+        rounding_adjustment = 0.00
+      end
+    else
+      rounding_adjustment = 0.00
+    end
+    return rounding_adjustment
+  end
+
   #Generate new Receipt No when it is not assigned
   def generate_receipt_no
     #shop_code and client_code