A machine that cost $225,000 has an estimated residual value of $25,000 and an estimated useful life of 25,000 machine hours. The company uses units-of-production depreciation and ran the machine 7.000 hours in year 1, 9,000 hours in year 2, and 6,000 hours in year 3 Calculate its book value at the end of year 3. (Do not round Intermediate calculations.) Book Value