At the beginning of 2017, your company buys a $31,600 piece of equipment that it expects to use for 4 years. The equipment has an estimated residual value of 4,000. The company expects to produce a total of 200,000 units. Actual production is as follows: 46,000 units in 2017, 48,000 units in 2018, 47,000 units in 2019, and 59,000 units in 2020. Required: a. Determine the depreciable cost. b. Calculate the depreciation expense per year under the straight-line method. c. Use the straight-line method to prepare a depreciation schedule. d. Calculate the depreciation rate per unit under the units-of-production method. e. Use the units-of-production method to prepare a depreciation schedule.