Steelcase Inc. is one of the largest manufacturers of office furniture in the United States. In Grand Rapids, Michigan, it produces filing cabinets in two departments: Fabrication and Assembly. Assume the following information for the Assembly Department: Direct labor per filing cabinet 30 minutes Supervisor salaries $111,000 per month Depreciation $25,000 per month Direct labor rate $12 per hour Prepare a flexible budget for 8,000, 10,000, and 12,000 filing cabinets for the month of August, similar to Exhibit 5, assuming that inventories are not significant. Enter all amounts as positive numbers.