Supplier A is offering a custom-made product to Company X at a price of $78 per unit. Company X estimates that the direct materials cost for the product is $30 per unit, the direct labor cost is $10 per unit, and the overhead cost is $20 per unit. What is the profit margin per unit for Supplier A? O a. 30% O b. 35% O C. O d. 40% 25% 2