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Brummer Corporation makes a product whose variable overhead standards are based on direct labor-hours. The quantity standard is 0.10 hours per unit. The variable overhead rate standard is $9.10 per hour. In January the company produced 9,800 units using 1,030 direct labor-hours. The actual variable overhead rate was $9.00 per hour. The variable overhead efficiency variance for January is: Multiple Choice $455 U $455 F $450 F $450 U