Eastern Inc. purchases a machine for $17,000. This machine qualifies as a five-year recovery asset under MACRS with the fixed depreciation percentages as follows: year t = 22% year 2 = 31% year 3 =; 19.2% year 4 = 11.52% Eastern has a tax rate of 20%. If the machine is sold at the end of four years for $4,200. what is book value of the machine when sold