Hunters, Inc. uses a standard cost system when accounting for its sole product. Manufacturing overhead is applied to production on the basis of process hours. Planned activity is 60,000 process hours per month, which gives rise to the following per-unit standards: Variable overhead: 13 hours at $15 per hour Fixed overhead: 13 hours at $7 per hour During September, 5,100 units were produced and the company incurred the following overhead costs: variable, $942,500; fixed, $429,000. Actual process hours totaled 65,000. Required: 1. Calculate the spending variance for variable overhead. 2. Calculate the efficiency variance for variable overhead. 3. Calculate the budget variance for fixed overhead. 4. Calculate the volume variance for fixed overhead.