Steelcase Inc. (SCS) 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 . . . . . . 18 minutes

Supervisor salaries . . . . . . . . . . . . .$250,000 per month

Depreciation . . . . . . . . . . . . . . . . . . $18,500 per month

Direct labor rate. . . . . . . . . . . . . . . . .$28 per hour

Prepare a flexible budget for 70,000, 80,000, and 90,000 filing cabinets for the month ending February 28 in the Assembly Department and Show All Work!