Standard Cost per Unit Actual Cost per Unit

Direct materials:

Standard: $1\mathrm{.}80$ feet at $$1\mathrm{.}40$ per foot $ $2\mathrm{.}52$

Actual: $1\mathrm{.}75$ feet at $$1\mathrm{.}80$ per foot $ $3\mathrm{.}15$

Direct labor:

Standard: $0\mathrm{.}90$ hours at $$17\mathrm{.}00$ per hour $15\mathrm{.}30$

Actual: $0\mathrm{.}95$ hours at $$16\mathrm{.}40$ per hour $15\mathrm{.}58$

Variable overhead:

Standard: $0\mathrm{.}90$ hours at $$6\mathrm{.}00$ per hour $5\mathrm{.}40$

Actual: $0\mathrm{.}95$ hours at $$5\mathrm{.}60$ per hour $5\mathrm{.}32$

Total cost per unit $ $23\mathrm{.}22$ $ $24\mathrm{.}05$

Excess of actual cost over standard cost per unit $ $0\mathrm{.}83$

The production superintendent was pleased when he saw this report and commented: $$This $$0\mathrm{.}83$ excess cost is well within the $5$ percent 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 $11,000$ units. Variable overhead cost is assigned to products on the basis of direct labor$-$hours. There were no beginning or ending inventories of materials.

Required:

Compute the following variances for May:

Materials price and quantity variances.

Labor rate and efficiency variances.

Variable overhead rate and efficiency variances.

How much of the $$0\mathrm{.}83$ excess unit cost is traceable to each of the variances computed in requirement $1.$

How much of the $$0\mathrm{.}83$ excess unit cost is traceable to apparent inefficient use of labor time?