Mary went to the store to buy fruit. Apples cost $1, oranges cost $2, and bananas cost $3. For every 5 fruits that customers buy, the store offers a $1 discount. Mary buys 5 apples, 3 oranges, and 2 bananas. How much will she pay?
Use reasoning to answer the following question.
15
For 5 apples, Mary will pay 5 * 1 = 5 dollars.

For 3 oranges, she will pay 3 * 2 = 6 dollars.

For 2 bananas, she will pay 2 * 3 = 6 dollars.

She bought 5 + 3 + 2 = 10 fruits.

For 10 fruits, Mary gets a discount of 10 / 5 = 2 dollars.

In total, the bill is 5 + 6 + 6 = 17 dollars.

Subtracting the discount offered by the stores, Mary will pay 17 - 2 = 15 dollars.

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The answer: 15