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