Scotty, there is a coupon code box in the upper left of the Cart. The caveat is that the purchase amount must be at least 10% of the coupon which would be $50 before it will process Sir.

On the upper left is a section for you to input said information codes.

when you put a item in the cart there is a box in the upper left side to enter the coupon code

Scotty, I always enter mine on top left of my cart page. There is a slot for coupon codes before you hit the continue button from my cart page. Then sales total reflect $5 discount before you proceed to address, shipping, and payment to complete order.