Companion Computer Company has been purchasing carrying cases for its portablecomputers at a delivered cost of $68 per unit. The company, which is currently operatingbelow full capacity, charges factory overhead to production at the rate of 40% ofdirect labor cost. The fully absorbed unit costs to produce comparable carrying cases are expected to be as follows:

Direct materials $25.00

Direct labor 32.00

Factory overhead (40% of direct labor) $12.80

Total cost per unit $69.80

If Companion Computer Company manufactures the carrying cases, fixed factoryoverhead costs will not increase and variable factory overhead costs associated with thecases are expected to be 15% of the direct labor costs.

a. Prepare a differential analysis report, dated October 11, 2010, for the make-or-buy decision.

b. On the basis of the data presented, would it be advisable to make the carryingcases or to continue buying them? Explain.