Outdoor Denim Co. has an annual plant capacity of 60,000 units, and current production is 45,000 units. Monthly fixed costs are $40,000, and variable costs are $21 per unit. The present selling price is $36 per unit. On January 18, 2006, the company received an offer from Barker Company for 13,000 units of the product at $28 each. Barker Company will market the units in a foreign country under its own brand name. The additional business is not expected to affect the domestic selling price or quantity of sales of Outdoor Denim Co.

a. Prepare a differential analysis report for the proposed sale to Barker Company.

b. Briefly explain the reason why accepting this additional business will increase operating income.

c. What is the minimum price per unit that would produce a contribution margin?