7. Assume Cruise Company can purchase 6,000 units of the part from Suri Company for $23.00 each, and the facilities currently used to make the part could be used to manufacture 6,000 units of another product that would have an $8 per unit contribution margin. If no additional fixed costs would be incurred, what should Cruise Company do?

a. Make the new product and buy the part to earn an extra $5.00 per unit contribution to profit.

b. Make the new product and buy the part to earn an extra $6.00 per unit contribution to profit.

c. Continue to make the part to earn an extra $2.00 per unit contribution to profit.

d. Continue to make the part to earn an extra $4.00 per unit contribution to profit.