es Mohr Company purchases a machine at the beginning of the year at a cost of $47,000. The machine is depreciated using the double-declining-balance method. The machine's useful life is estimated to be 5 years with a $7,000 salvage value. The machine's book value at the end of year 2 is: Multiple Choice O O $13,600. $28,200. $16,920. $18,800.