Make-or-Buy Decision. Ocean Products, Inc., currently manufactures its own surfboards for customers. Management is interested in outsourcing production of these surfboards to a reputable manufacturing company that can supply the surfboards for $80 per unit. Ocean Products, Inc., incurs the following annual production costs to produce 10,000 surfboards internally. Total Annual Per Unit Cost at 10,000 Units Variable production costs Direct materials $20 $200,000 Direct labor 10 100,000 Manufacturing overhead 30 300,000 Fixed production costs Factory building and equipment lease Factory insurance 70,000 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 Ocean Products, Inc. Required: a. Perform differential analysis using the format presented in Figure.2. Assume making the surfboards internally is Alternative 1, and buying the surfboards from an outside manufacturer is Alternative 2. b. Which alternative is best? Explain. c. Summarize the result of outsourcing production using the format presented in Figure.3. d. Compare the format used in requirement a with that of requirement c.