A manufacturing company that has only one product has established the following standards for its variable manufacturing overhead. Variable manufacturing overhead standards are based on machine-hours. Standard hours per unit of output 3.90 machine-hours Standard variable overhead rate $11.25 per machine-hour The following data pertain to operations for the last month: Actual hours 8,800 machine-hours Actual total variable manufacturing overhead cost $95,850 Actual output 2,200 units What is the variable overhead efficiency variance for the month? $2,692 U $7,513 F $2,475 U $7,513 U