Question
One restaurant was having a special promotion for buffet. Mary wanted to invite her pupils for a meal at the restaurant. Each buffet set costs $13.80. What is the minimum amount that Mary must pay for her 17 pupils?

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One restaurant was having a special promotion for buffet. Mary wanted to invite her pupils for a meal at the restaurant. Each buffet set costs $13.80. What is the minimum amount that Mary must pay for her 17 pupils?