coupon teller

例句：

1. 1. The store has a coupon redemption counter for customers to use theircoupons.
   商店有一个优惠券兑换柜台，供顾客使用他们的优惠券。
2. 2. The cashier atthe grocery store was instructed to assist customersin using their coupons.
   杂货店的收银员被指示协助顾客使用他们的优惠券。
3. 3. The bank offers a special service wherecustomers can exchange their old coupons for newones.
   银行提供一项特殊服务，顾客可以将旧的优惠券换成新的。