M9-5 Computing Book Value (Units-of-Production Depreciation) [LO 9-3] A machine that cost $644,000 has an estimated residual value of $28,000 and an estimated useful life of 28,000 machine hours. The company uses units-of-production depreciation and ran the machine 8,000 hours in year 1,10,000 hours in year 2, and 7,000 hours in year 3 Calculate its book value at the end of year 3 (Do not round intermediate calculations.) Book Value