1. Sign in to your account via web or app.
2. Add your desired items, then view your cart to review your order.
3. On the "Shopping cart" page, look for "Promo code", then tap on "Add".
4. Key in the promo code as shown on your voucher, then tap "Apply"
5. Check that you have a $5 net purchase amount after application of promo code in order to be able to check out.
For more information, you may refer to the following link for the terms and conditions.