The direct materials and direct labor data shown below pertain to the operations of Viet Manufacturing Company for the month of August.

Costs

Quantities

Actual labor rate

$13 per hour

Actual hours incurred

and used

4,200 hours

Actual materials price

$128 per ton

Actual quantity of

materials purchased

and used

1,200 tons

Standard labor rate

$12 per hour

Standard hours used

1,200 tons

Standard materials price

$130 per ton

Standard quantity of

materials used

1,200 tons

Instructions

(a) Compute the total, price, and quantity variances for materials and labor.

(b) Provide two possible explanations for each of the unfavorable variances calculated above, and suggest where responsibility for the unfavorable result might be placed.