The Gilster Company, a machine tooling firm, has several plants. One plant, located in St. Falls, Minnesota, uses a job order costing system for its batch production processes. The St. Falls plant has two departments through which most jobs pass. Plantwide overhead, which includes the plant managers salary, accounting personnel, cafeteria, and human resources, is budgeted at $250,000. During the past year, actual plantwide overhead was $240,000. Each departments overhead consists primarily of depreciation and other machine-related expenses. Selected budgeted and actual data from the St. Falls plant for the past year are as follows.

	Department A				Department B
Budgeted department overhead
(excludes plantwide overhead)	$	150,000			$	600,000
Actual department overhead		160,000				620,000
Expected total activity:
Direct labor hours		35,000				15,000
Machine-hours		10,000				40,000
Actual activity:
Direct labor hours		51,000				9,000
Machine-hours		10,500				42,000

For the coming year, the accountants at St. Falls are in the process of helping the sales force create bids for several jobs. Projected data pertaining only to job no. 110 are as follows.

Direct materials	$	25,000
Direct labor cost:
Department A (2,200 hr)		45,000
Department B (800 hr)		10,000
Machine-hours projected:
Department A		200
Department B		1,200
Units produced		10,000

Assume the St. Falls plant uses three separate overhead rates to assign overhead costs to jobs.

b-1. Find the plant wide overhead rate by using expected machine hours.

b-2. Find the department overhead rate using expected machine hours for Department A and Department B.

b-3. Calculate the projected manufacturing costs for job 110 using the three separate rates computed in b-1 and b-2.

d. Using the allocation rates in part b, compute the under- or overapplied overhead for the St. Falls plant for the year.

e. A St. Falls subcontractor has offered to produce the parts for job no. 110 for a price of $12 per unit. Assume the St. Falls sales force has already committed to the bid price based on the calculations in part b. Should St. Falls buy the $12 per unit part from the subcontractor or continue to make the parts for job no. 110 itself?

• Continue to make the part

• Buy part from the subcontractor