Lynwood Company produces surge protectors. To help control costs, Lynwood employs a standard costing system and uses a flexible budget to predict overhead costs at various levels of activity. For the most recent year, Lynwood used a standard overhead rate of $18 per direct labor hour. The rate was computed using practical activity. Budgeted overhead costs are $396,000 for 18,000 direct labor hours and $540,000 for 30,000 direct labor hours. During the past year, Lynwood generated the following data: (a) Actual production: 100,000 units; (b) Fixed overhead volume variance: $20,000 U; (c) Variable overhead efficiency variance: $18,000 F; (d) Actual fixed overhead costs: $200,000; and (e) Actual variable overhead costs: $310,000.