Problem setting up category discounts totals
Ok my setup is made so i can give discounts to every category in a sumary page. each category is seperated so it shows the categorys subtotal then i have a Discount Rate box to give it a % discount and it discount box which shows how much is being discounted and the subtotal box which shows the subtotal discounted.
Now what i want it to do is minus the total discounts of the subtotal category discounts into the original subtotal so i can get the grandtotal. but for some reason i cant get it right any tips would be great