Star Appliance manufactures a variety of appliances which all use Part 92F. Currently, Star Appliance manufactures Part 92F itself. It has been producing 8,000 units of Part 92F annually. The annual costs of producing Part 92F at the level of 8,000 units include: The fixed manufacturing overhead costs would not continue if Part 92F is purchased from an outside supplier. Assume Star Appliance can purchase 8,000 units of the part from the Roger Parts Company for $15.50 each, and the facilities currently used to make the part could be used to manufacture 8,000 units of another product that would have a $3 per unit contribution margin. If no additional fixed costs would be incurred, what should Star Appliance do? A. Make the new product and buy the part to earn an extra $8.50 per unit contribution to profit. B. Make the new product and buy the part to earn an extra $5.50 per unit contribution to profit. C. Continue to make the part to earn an extra $1.00 per unit contribution to profit. D. Continue to make the part to earn an extra $2.50 per unit contribution to profit