Usually the person who accepts your payment and gives you a receipt in return is the cashier. In hotels, supermarkets, department stores, Best Buys, and similar stores, the person who collects your money is called a "cashier." At a movie theater, there are usually "box office cashiers" who sell tickets, and "concession stand cashiers" who sell popcorn and refreshments. In the US, folks that handle cash at banks are called "tellers," not "cashiers."
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