Add all the products you would like to purchase to your cart. When you are ready to checkout, if you are not already on "Your shopping cart" page, then click the "CART" text link or shopping cart icon at the top of any HT MART page. Next, scroll to the bottom of the shopping cart page, and you will see a box to enter your Discount Coupon Code. Enter it exactly as provided, as the entry is case-sensitive, then click the "Submit" text link or "GO" button. The Shopping Cart will then recalculate your order total.