Landers Company manufactures a number of products. The standards relating to one of these products are shown below, along with actual cost data for May.

Standard cost per unit Actual cost per unit

Direct materials:

Standard: 1.80 feet at $3.00 per foot $5.40

Actual: 1.75 feet at $3.20 per foot $5.60

Direct labour:

Standard: 0.90 hours at $18.00 per hour $16.20

Actual: 0.95 hours at $17.40 per hour $16.53

Variable overhead:

Standard: 0.90 hours at $5.00 per hour $4.50

Actual: 0.95 hours at $4.60 per hour $4.37

Total cost per unit $26.10 $ 26.50

Excess of actual cost over standard cost per unit $0.40

The production superintendent was pleased when he saw this report and commented: "This $0.40 excess cost is well within the 2% limit management has set for acceptable variances. It's obvious that there's not much to worry about with this product."

Actual production for the month was 12,000 units. Variable overhead cost is assigned to products on the basis of direct labour-hours. There were no beginning or ending inventories of material

Required:

1. Compute the following variances for May:

a. Materials quantity and price variances.

b. Labour efficiency and rate variances.

c. Variable overhead efficiency and rate variances.

2. How much of the $0.40 excess unit cost is traceable to each of the variances computed in Requirement (1) above?

3. How much of the $0.40 excess unit cost is traceable to apparent inefficient use of labour time?

4. Do you agree that the excess unit cost is not of concern?