Mohr Company purchases a mechine at the beginning of the year at a cost of $40,000. The machine is depreciated using the straight-line method. The machine's useful life is estimated to be 8 years with a $9,000 salvage value. The book velue of the machine at the end of year 2 is: O $3,875 O $7750 $23,250 $32.250. $31,000