Question

Your computer-supply store sells two types of inkjet printers. The first, type A, costs $237 and you make a $22 profit on each one. The second, type B, costs $122 and you make a $19 profit on each one. You can order no more than 120 printers this month, and you need to make at least $2,400 profit on them. If you must order at least one of each type of printer, how many of each type of printer should you order if you want to minimize your cost?
A. 69 of type A : 51 of type B
B. 40 of type A : 80 of type B
C. 51 of type A : 69 of type B
D. 80 of type A : 40 of type B