2005 Cayley Problem 6

Last week, a charity fundraiser had 8 volunteers who each worked 40 hours and who each raised \$18 per hour. This week, 12 volunteers, each working 32 hours, raised the same total amount of money. How much did each volunteer raise per hour this week?

\textbf{(A)}\ \$9\quad \textbf{(B)}\ \$12\quad \textbf{(C)}\ \$15\quad \textbf{(D)}\ \$21\quad \textbf{(E)}\ \$24

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Cayley contests here.