Solve the problem.The Paperback Trader is a book store that takes in used paperbacks for 20% of their cover price and sells them for 50% of their cover price. Pat brings in a stack of 17 paperback books to trade and gets $17.17 credit. Some of the books had a cover price of $6.99, the rest $3.99. She wants to get some Tom Clancy books having a cover price of $6.99. How many $6.99 books did she bring in and how many Clancy books can she get without paying any additional cash?
A. 11 $6.99 books, 2 Clancy books
B. 6 $6.99 books, 4 Clancy books
C. 6 $6.99 books, 2 Clancy books
D. 6 $6.99 books, 5 Clancy books
Answer: B
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