On January 1, year 1, a company purchased machinery at a cost of $200,000. Book depreciation was calculated using the straight-line balance method over an estimated useful life of 20 years and no salvage value. The company recognized a full year of depreciation in the year of acquisition. The fair market value is the same as the book value if not stated otherwise. The companys policy is to maximize the book value of the machinery. Based on a year 2 engineering study, a $10,000 impairment loss was recognized at the end of year 2 (after depreciation is recognized). Based on a year 4 engineering study, the fair market value of the machinery was determined as $155,000 at the end of year 4 (after depreciation is recognized).

Determine the book value of the machinery on December 31 in year 1 in accordance with US GAAP.

Determine the book value of the machinery on December 31 in year 2 in accordance with US GAAP.

Determine the book value of the machinery on December 31 in year 3 in accordance with US GAAP.

Determine the book value of the machinery on December 31 in year 4 in accordance with US GAAP.