Katye received 15 gifts and a total of $100 in cash for her birthday. She buys one book that costs $23, and she wants to donate $10 to each of several local charities. How much money will Katye have left over if she donates to as many charities as possible?Check only the clues that are important to the problem.

The number of gifts does not affect how much money Katye has, so clue A is not important. The relevant clues are that she received $100, buys a $23 book, and donates $10 to each charity while donating to as many as possible. After buying the book, she has $77; she can donate $70 to seven charities, leaving $7. Therefore, the important clues are B, C, D, and E.

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