Sunday Corporation prepared the following performance report for variable overhead costs for the last quarter of the year. Machine hours are the cost driver for all overhead costs. Cost Driver(Machine Hours) Variable Overhead Costs: Actual 38,000 Static Budget 35,000 Variances Utilities $15,700 $14,000 $1,700 U Indirect Labor 86,500 80,500 6,000 U Supplies 26,000 21,000 5,000 U Maintenance 44,900 42,000 2,900 U Total Variable Overhead Costs $173,100 $157,500 $15,600 U The cost formulas used for the variable overhead costs are: Variable Overhead Costs Cost Formula Utilities Indirect Labor Supplies Maintenance $0.40 per machine hour $2.30 per machine hour $0.60 per machine hour $1.20 per machine hour Your boss called you into the office and reprimanded you for the unfavorable variances. The boss says you are fired unless you can explain why the variances are all unfavorable. Required: Calculate the flexible budget variances and the activity-level variances for each cost. You can refer to Exhibit 8-6 and replace Sales-Activity Variance Column with Activity Level Variance. You are essentially calculating the Variable Costs variances.