Question

Troy Engines, Ltd., manufactures a variety of engines for use in heavy equipment. The company has always produced all of the necessary parts for its engines, including all of the carburetors. An outside supplier has offered to sell one type of carburetor to Troy Engines, Ltd., for a cost of $35 per unit. To evaluate this offer, Troy Engines, Ltd., has gathered the following information relating to its own cost of producing the carburetor internally:

	Per Unit				20,000 Units Per Year
Direct materials	$	17		$	340,000
Direct labor		11			220,000
Variable manufacturing overhead		3			60,000
Fixed manufacturing overhead, traceable		3	*		60,000
Fixed manufacturing overhead, allocated		6			120,000
Total cost	$	40		$	800,000

*One-third supervisory salaries; two-thirds depreciation of special equipment (no resale value).

Required:

1. Assuming the company has no alternative use for the facilities that are now being used to produce the carburetors, what would be the financial advantage (disadvantage) of buying 20,000 carburetors from the outside supplier?

2. Should the outside supplier’s offer be accepted?

3. Suppose that if the carburetors were purchased, Troy Engines, Ltd., could use the freed capacity to launch a new product. The segment margin of the new product would be $200,000 per year. Given this new assumption, what would be financial advantage (disadvantage) of buying 20,000 carburetors from the outside supplier?

4. Given the new assumption in requirement 3, should the outside supplier’s offer be accepted?

Answer 1

1) Differential analysis :

	Make	Buy
Direct material	340000
Direct labour	220000
Variable overhead	60000
Fixed overhead (supervisor's salary)	20000
Purchase cost		700000
Total	640000	700000

2) Outside supplier's offer should not be accepted.

3) Differential analysis :

	Make	Buy
Direct material	340000
Direct labour	220000
Variable overhead	60000
Fixed overhead (supervisor's salary)	20000
Opportunity cost	200000
Purchase cost		700000
Total	840000	700000

4) Outside supplier's offer should be accepted.