need help with steps please

A machine used in the manufacture of fabricated metal products at Crimson Tide Inc., with a useful life of 12 years, is to be depreciated by the MACRS method for tax depreciation purposes. The machine has a first cost of $23,000 with a $3000 salvage value. The company's controller wants to understand the effects of the difference in the annual depreciation charge for SL and MACRS with CDS recovery period. Using a half-year convention for both methods, determine the differences in the book value if the machine is sold at the end of year 5