Marshall Company purchases a machine for $480,000. The machine has an estimated residual value of $40,000. The company expects the machine to produce four million units. The machine is used to make 560,000 units during the current period. If the units-of-production method is used, the depreciation expense for this period is:_____.
a. $38,500.b. $700,000.c. $660,000.d. $35,000.