Mohr Company purchases a machine at the beginning of the year at a cost of $38,000. The machine is depreciated using the straight-line method. The machine's useful life is estimated to be 5 years with a $7000 salvage value. Depreciation expense in year 2 is: Martin Company purchases a machine at the beginning of the year at a cost of $110,000. The machine is depreciated using the double-declining-balance method.The machine's usefu ife s estimated to be 4 years with a $9,100 salvage value. The machine's book value at the end of year 3 is