Wall Corporation, which produces commercial safes, has provided the following data: Budgeted production 9,300 safes Standard machine-hours per safe 8.0 machine-hours Standard supplies cost $8.60 per machine-hour Actual production 9,500 safes Actual machine-hours 76,360 machine-hours Actual supplies cost $706,566 Supplies cost is an element of variable manufacturing overhead. The variable overhead efficiency variance for supplies is closest to: $3,096 U $52,966 F $52,966 U $3,096 F