Nina Company prepared the following fixed budget for July using 7,840 units for budgeted sales. Actual sales were 7,540 units and actual costs are shown below. Fixed Budget For Month Ended July 31 Variable Amount per Unit Total Fixed Cost Fixed Budget (7,840 units) Actual Results (7,540 units) Sales $ 100 $ 784,000 $ 770,490 Variable costs Direct materials 35 274,400 279,040 Direct labor 15 117,600 114,700 Indirect materials 4 31,360 29,560 Sales commissions 11 86,240 81,970 Total variable costs 65 509,600 505,270 Contribution margin $ 35 $ 274,400 $ 265,220 Fixed costs DepreciationMachinery $ 71,430 71,430 71,430 Supervisor salary 42,370 42,370 43,640 Insurance 10,510 10,510 10,510 DepreciationOffice equipment 7,740 7,740 7,740 Administrative salaries 33,900 33,900 31,160 Total fixed costs $ 165,950 165,950 164,480 Income $ 108,450 $ 100,740 Prepare a flexible budget performance report for July at activity level of 7,540 units. Show variances between budgeted and actu