You must purchase at least one item listed in the current sale.
All other items added are then applied to your subtotal. So even if you select
items that are not in the sale, they still count to possibly get you a larger
discount on the items listed in the sale.
The discount is only applied to the items listed in the sale.
Select the proper coupon which you will insert in the final pages of your checkout.
If using Google Checkout you will be prompted to enter your coupon code in the
last page of your Google Checkout.