M8.6 Computing Book Value (Units-of-Production Depreciation) L08-3 A three-year-old machine has a cost of $19,100, an estimated residual value of $2.600, and an estimated useful life of 33.000 machine hours. The company uses units-of-production depreciation and ran the machine 4,400 hours in year 1, 8,050 hours in year 2; and 8,200 hours in year 3 Calculate the net book value at the end of the third year