Scan QR enter store, take coffee from Coffeemaker, there are different taste you can pick. This Coffeemaker is a vendor, customer need to pay by MobilePay then pick coffee. There are other snacks customer can pick before he leave the store, like chocolate. Then customer can self check on checkout by MobilePay. After payment, put commodity on table for deactive, there is a receipt will be printed by this checkout. Without alarm after deactivate, customer leave from the exit.