Curtis Corporations contribution margin is $25 per unit for Product A and $30 for Product B. Product A requires 2 machine hours and Product B requires 4 machine hours. How much is the contribution margin per unit of limited resource for each product? A B a. $12.50 $7.50 b. $12.50 $8.33 c. $10.00 $7.50 d. $10.00 $8.33