Dave bought 8 books about animals, 6 books about outer space, and 3 books about trains to keep him busy over the holidays. Each book cost $6. How much did Dave spend on the books?
Thoughts? Step-by-step reasoning:
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Dave buys 8 books + 6 books + 3 books = 17 books in total. He has to spend 17 books × $6 / book = $102 if he wants to buy all the books.
Thus, the answer is 102.
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