Task: Question Answering
Input (English): Problem: a certain store sells all maps at one price and all books at another price. on monday the store sold 10 maps and 8 books for a total of $ 22.00, and on tuesday the store sold 20 maps and 15 books for a total of $ 60.00. at this store, how much less does a map sell for than a book ?
Options: a. $ - 5.4, b. $ 0.50, c. $ 0.75, d. $ 1.00, e. $ l. 25
Output (English): a