4. During a book sale, Alex sold 1 book for 55.00,
2 books for $4.50 each, and 4 books for $2.50 each.
Dana sold 3 books for $1.50 each and 2 books for
$5.00 each. What was the most frequently occurring
sale price for these 12 books?
(A) $2.50
(B) $4.00
(C) $4.25
(D) $4.50
(E) $5.00
