Rogen Corporation manufactures a single product. The standard cost per unit of p

Question

Rogen Corporation manufactures a single product. The standard cost per unit of product is shown below.

Direct materials—1 pound plastic at $7.00 per pound $ 7.00

Direct labor—1.6 hours at $12.00 per hour 19.20

Variable manufacturing overhead 12.00

Fixed manufacturing overhead 4.00

Total standard cost per unit $42.20

The predetermined manufacturing overhead rate is $10 per direct labor hour ($16.00 ÷ 1.6). It was computed from a master manufacturing overhead budget based on normal production of 8,000 direct labor hours (5,000 units) for the month. The master budget showed total variable costs of $60,000 ($7.50 per hour) and total fixed overhead costs of $20,000 ($2.50 per hour). Actual costs for October in producing 4,800 units were as follows.

Direct materials (5,100 pounds) $ 36,720

Direct labor (7,400 hours) 92,500

Variable overhead 59,700

Fixed overhead 21,000

Total manufacturing costs $209,920

The purchasing department buys the quantities of raw materials that are expected to be used in production each month. Raw materials inventories, therefore, can be ignored.

Compute the overhead controllable variance and the overhead volume variance.

Explanation / Answer

Overhead Controllable Variance

Actual overhead expense - (budgeted overhead per unit x standard number of units)

= 80,700(59,000 + 21,000) - (10*8,000)

=700 Unfavourable

Overhead Volume variance

* Fixed Overhead Absorption Rate per unit of output

= (4800 * 2.5) - (5000 * 2.5)

= 500 Favourable

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