Martin Company purchases a machine at the beginning of the year at a cost of $155,000. The machine is depreciated using the double-declining-balance method. The machine's useful life is estimated to be 4 years with a $12,900 salvage value. The machine's book value at the end of year 3 is: Multiple Choice $116,250 $17.756. $135,625 $77,500 $19.375