Here you can purchase gift cards for others (Or yourself) meaning that's how many slickles are knocked off the payment.

This also can represent coupons.
How to purchase a Gift Card/Coupon:
1. Save the image above.
2. Pay
*If you get a 5 Slickle coupon, it costs 5 Slickles. If 10 slickle, it cost ten and so on.
3A. Give it to a friend (Tell me who, so I don't get scemmed.)
3B. Keep it for later