Olsen Company uses a standard cost system for its production process. Olsen Company applies overhead based on direct labor hours. The following information is available for July: Standard: Direct labor hours per unit 2.20 Variable overhead per hour $2.50 Fixed overhead per hour (based on 11,990 DLHs) $3.00 Actual: Units produced 4,400 Direct labor hours 8,800 Variable overhead $29,950 Fixed overhead $42,300 Refer to Olsen Company Using the three-variance approach, what is the efficiency variance