solve using step down method

problem 15-30. Costs Support departments Buildings and grounds Personnel General plant administration Cafeteria: operating costs Storeroom Operating departments Machining Assembly 45000 7800 36120 20670 18300 127890 Immo-NM 36000 60000 96000 Total 223890 DLH Building and grounds Pesonnel General plant administration Cafeteria: operating costs Storeroom Machining Assembly #of Employees 0 0 40 10 5 55 140 250 Square Indirect of Feet LH Requisitions 0 0 0 25000 0 12000 0 0 4500 3000 6000 2000 22000 13000 10000 203000 26000 8300 250000 44000 18300 mt in 10000 30000 40000