Required information [The following information applies to the questions displayed below.) Three different companies each purchased trucks on January 1, 2018, for $72,000. Each truck was expected to last four years or 200,000 miles. Salvage value was estimated to be $7,000. All three trucks were driven 67,000 miles in 2018, 42,000 miles in 2019, 40,000 miles in 2020, and 62,000 miles in 2021. Each of the three companies earned $61,000 of cash revenue during each of the four years. Company A uses straight-line depreciation, company B uses double- declining-balance depreciation, and company C uses units-of-production depreciation. Answer each of the following questions. Ignore the effects of income taxes. C-1. Calculate the book value on the December 31, 2020, balance sheet? (Round "Per Unit Cost" to 3 decimal places.) Book Value Company A Company B Company C