The following data for November have been provided by Genghis Corporation, a producer of precision drills for oil exploration:

Budgeted production 4,600 drills

Standard machine-hours per drill 7.5 machine-hours

Standard indirect labor $10.00 per machine-hour

Standard power $3.10 per machine-hour

Actual production 5,100 drills

Actual machine-hours 35,660 machine-hours

Actual indirect labor $370,784

Actual power $107,450

Show your work please.

a. Compute the variable overhead rate variances for indirect labor for November.

b. Compute the variable overhead rate variances for power for November.

c. Compute the variable overhead efficiency variances for indirect labor for November.

d. Compute the variable overhead efficiency variances for power for November.