Flexible Budget for Assembly Department Steelcase Inc. is one of the largest manufacturers of office furniture in the United States. In Grand Rapids, Michigan, it assembles filing cabinets in an Assembly Department. Assume the following information for the Assembly Department: Direct labor per filing cabinet 15 minutes Supervisor salaries $200,000 per month Depreciation $30,000 per month Direct labor rate $25 per hour Prepare a flexible budget for 25,000, 40,000, and 55,000 filing cabinets for the month of March in the Assembly Department, similar to Exhibit 5. Steelcase Inc. Assembly Department Budget For the Month Ending March 31 (assumed data)