A certain store sells all maps at one price and all books at another price. On Monday the store sold 12 maps and 10 books for a total of $38.00, and on Tuesday the store sold 12 maps and 9 books for a total of $30.00. At this store, how much less does a map sell for than a book?  Choose the correct choice from the following answers
A) $0.25	B) $0.50	C) $0.75	D) $1.00	E) $4.5
12x+10y=38   12x+9y=30   subtracting 1 from 2   y=8   therefore   x=3.5   difference in price =4.5   $4.5
<result>E</result>
A certain store sells all maps at one price and all books at another price. On Monday the store sold 12 maps and 10 books for a total of $38.00, and on Tuesday the store sold 12 maps and 9 books for a total of $30.00. At this store, how much less does a map sell for than a book?