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account - n. a record of money that has been paid and money that has been received
cashier - n. a person whose job is to take in or give out money in a store, bank, etc.
queue - n. (British) a line of people who are waiting for something
shopping - n. he activity of visiting places where goods are sold in order to look at and buy things (such as food, clothing, etc.)
customer - n. someone who buys goods or services from a business
grocery store - n. a store that sells food and household supplies
