Sinopoli Corporation bases its budgets on machine-hours. The company's static planning budget for September appears below: Budgeted number of machine-hours 8, 500 Budgeted variable costs: Supplies (@ $1.50 per machine-hour) $12, 750 Power (@ $3.30 per machine-hour) 28, 050 Budgeted fixed costs: Salaries 15, 300 Equipment depreciation 37, 400 Total expense $93, 500 Prepare a flexible budget for 8, 600 machine-hours per month