So, you have a Coupon Code. How do you use it?
It is very simple.
After adding items to your shopping cart, simply click on "View Cart". There will be an option there for you to "Apply Discount Code".
Click on "Apply Discount Code", input your Coupon Code and click on "Apply Coupon"!
If all is well, the coupon will be applied and you can proceed to checkout!
Take note that you are to apply the Coupon Code just before checking out.