coupon script and basic interface

### Description | Project Coupons: We have a payment page see screenshot we want to add like showing in jpeg(will be give you in HTML) a discount coupon links that based on code entered will update the product links(product links given to us by our payment processor [login to view URL] - we set them upo on their end before hand) So basically as shown here (previous page) [login to view URL] (will send you this script so u can see code we have now) and we send you the current payment page we need to make the coupon work as described in this project so we will send you:[login to view URL] rest in zip with screenshot |