Wheels, Inc., currently manufactures its own custom rims for automobiles. Management is interested in outsourcing production of these rims to a reputable manufacturing company that can supply the rims for $80 per unit. Wheels, Inc., incurs the following annual production costs to produce 10,000 rims internally.

	Per Unit	Total Annual Cost at 10,000 Units
Variable production costs
Direct materials	$ 20	$ 200,000
Direct labor	$ 10	100,000
Applied (and actual) factory overhead	$ 30	300,000
Fixed production costs
Factory building and equipment lease		70,000
Factory insurance		50,000
Production supervisor's salary		100,000
Total production costs		$ 820,000

If production is outsourced, all variable production costs, factory building and equipment lease costs, and factory insurance costs will be eliminated. The production supervisor's salary cost will remain regardless of the decision to outsource or to produce internally because the supervisor recently signed a long-term contract with Wheels, Inc.

Required:

a. Perform differential analysis using the format presented in Figure 7.2. Assume making the rims internally is Alternative 1, and buying the rims from an outside manufacturer is Alternative 2.

b. Which alternative is best? Explain.