Admac Technologies has a standard variable overhead rate of $5.50 per machine hour, and each unit produced has a standard time allowed of 2.50 hours. The company's static budget was based on 46,000 units. Actual results for the year follow. Actual units produced: 42,000 Actual machine hours worked: 100,000 Actual variable overhead incurred: $530,000 Admac's variable-overhead spending variance is: Multiple Choice $20,000 favorable $20,000 unfavorable $27,500 favorable. $27.500 unfavorable O None of the answers is correct