In PSS, the process of recording item sales, processing refunds, recording coupons, handling voids, verifying checks before accepting them as tender, and arriving at the amount to be paid by or to a customer.

• 在可编程商店系统（ss），记录物品的销售、处理偿还、记优待卷、处理空闲、证购货支票、收顾客交款或向顾客付款。