Marshall Company purchases a machine for $200,000. The machine has an estimated residual value of $80,000. The company expects the machine to produce four million units. The machine is used to make 440,000 units during the current period. If the units-of-production method is used, the depreciation expense for this period is: Multiple Choice d $440,000. $13,200. O $22,000. O $360,000 O