Wadding Corporation applies manufacturing overhead to products on the basis of standard machine-hours. For the most recent month, the company based its budget on 3,600 machine-hours. Budgeted and actual overhead costs for the month appear below: Static Actual Budget Costs Variable overhead costs: Supplies $11,160 $11,830 Indirect labor 26,280 27.970 Total VO costs 37,440 39,800 Fixed overhead costs: Supervision 19,700 19,340 Utilities 5,900 5,770 Factory depreciation _6.900 7.210 Total FO costs 32.500 32.320 Total overhead cost $69.940 $72.120 The company actually worked 3,900 machine-hours and produced 778 output units during the month. The standard hours per unit are 5 machine-hours for the month, The overall variable overhead efficiency variance for the month was: $760 favorable $656 favorable $134 unfavorable $104 unfavorable