At the beginning of 2020, your company buys a $28,800 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: 45,000 units in 2020, 51,000 units in 2021, 48,000 units in 2022, and 56,000 units in 2023. 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