ABC Bookstore sells packages of books that include both new and used
books. New books cost $18 and used books cost $9. The bookstore wants to
sell packages that have 36 books total, and the store charges $432 for each
package. How many new and used books will be in each package?
OA. 18 new, 9 used
O B. 9 new, 18 used
O C. 12 new, 24 used
о D. 24 new, 12 used