Any help would be greatly appreciated. Thanks.

The Maxit Corporation has a standard costing system in which variable manufacturing overhead is assigned to production on the basis or standard machine-hours. The following data are available for July: - Actual variable manufacturing overhead cost incurred: $22,840 - Actual machine-hours worked: 1,700 hours - Variable overhead rate variance: $3,570 U - Total variable overhead spending variance: \$4,840 U The variable overhead efficiency variance for July is: The variable overhead efficiency variance for July is: Multiple Choice $1,270F $8,410F $8,410U $1,270U