Maria produces two models of sunglasses; Standard and Deluxe. If sales price Standard is 22 and Deluxe is 32 and variable costs for Standard is 17 and 22 for Deluxe. Company has 1,500 machine hours available. In one machine hour Maria can produce 70 pairs of Standard and 30 pairs of Deluxe model. What is the contribution per pair of both models- standard & Deluxe?

A. 5 and 10

B. 3 and7

C. 4 and 8

D. 6 and 12