2 3 E11-12 (Depreciation Computation-Addition, Change in Estimate) In 1988, Abraham Company com- pleted the construction of a building at a cost of 1,900,000 and first occupied it in January 1989. It was esti- mated that the building will have a useful life of 40 years and a residual value of 60,000 at the end of that time. Early in 1999, an addition to the building was constructed at a cost of 470,000. At that time it was estimated that the remaining life of the building would be, as originally estimated, an additional 30 years and that the addition would have a life of 30 years and a residual value of 20,000 In 2017, it is determined that the probable life of the building and addition will extend to the end of 2048, or 20 years beyond the original estimate Instructions (a) Using the straight-line method, compute the annual depreciation that would have been charged from 1989 through 1998 (b) Compute (c) Prepare the entry, the annual depre ciation that would have been charged from 1999 through 2016 if necessary, to adjust the account balances because of the revision of the esti- mated life in 2017. (d) Compute the annual depreciation to be charged beginning with 2017