Question: The Maxwell Corporation has a standard costing system in which variable manufacturing overhead is assigned to production on the basis of standard machine-hours. The following data are available for July:

• Actual variable manufacturing overhead cost incurred: $22,620

• Actual machine-hours worked: 1,600 hours

• Variable overhead rate variance: $3,420 Unfavorable

• Total variable overhead spending variance: $4,620 Unfavorable

The variable overhead efficiency variance for July is:

$8,040 Unfavorable

$8,040 Favorable

$1,200 Unfavorable

$1,200 Favorable