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Mobley purchased a used van for use in its business on January 1, 2017. It paid $9,000 for the van. Mobley expects the van to have a useful life of four years, with an estimated residual value of $600. Mobley expects to drive the van 21,000 miles during 2017, 22,000 miles during 2018, 25,000 miles in 2019, and 2,000 miles in 2020, for total expected miles of 70,000. Read the requirements. (Complete all answer boxes. Enter a "0" for any zero values. Use three decimal places for the depreciation cost per mile.) Units-of-production method Annual Depreciation Expense Accumulated Depreciation Year Book Value Start 2017 2018 2019 2020 X Requirements Using the units-of-production method of depreciation (with miles as the production unit), calculate the following amounts for the van for each of the four years of its expected life (do not round here; use three decimal places for the depreciation cost per mile): a. Depreciation expense b. Accumulated depreciation balance c. Book value Enter any numbe ? Print Done Save for Late