The following overhead data are for a department for a large company. Actual costs static Incurred budget Activity level (in units) 360 340 Varible costs: Indirect materials $4, 182 $4,148 Electricity $2,536 $2,414 Fixed costs: Administration $6,540 $6500 Rent $6,310 $6,400 Required: Construct a flexible budget performance report that would be useful in assessing how well costs were controlled in this department.