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 3,700 machine-hours. Budgeted and actual overhead costs for the month appear below: Variable overhead costs: Supplies Original Budget Based on 3,700 Actual Costs $11,930 Machine-Hours $11,350 Indirect labor 27,500 28,070 Fixed overhead costs: Supervision 19,800 19,440 Utilities 6,000 5,880 Factory depreciation Total overhead cost. 7,000 $71,650 7,310 $72,630 The company actually worked 4,200 machine-hours during the month. The standard hours allowed for the actual output were 4,190 machine-hours for the month. What was the overall variable overhead efficiency variance for the month?