The only way to purchase Brand X muffins is to buy one or more boxes that each contain 6 muffins. Each box costs \$1.50. If Alejandro needs at least 20 muffins, what is the least amount of money he could spend?
(A)\$3.00 (B)\$4.50 (C)\$6.00 (D)\$7.50 (E)\$30.00
C