The following standards for variable manufacturing overhead have been established for a company that makes only one product: Standard hours per unit of output 5.2 hours Standard variable overhead rate $11.60 per hour The following data pertain to operations for the last month: Actual hours 2,500 hours Actual total variable manufacturing overhead cost $29,590 Actual output 150 units What is the variable overhead efficiency variance for the month?

$20,542 U $590 F $19,952 U $9,048 F