The following standards for variable manufacturing overhead have been established for a company that makes only one product: Standard hours per unit of output 8.1 hours Standard variable overhead rate $ 14.85 per hour The following data pertain to operations for the last month: Actual hours 8,600 hours Actual total variable manufacturing overhead cost Actual output $ 130,720 1,000 units What is the variable overhead efficiency variance for the month? Select one: