In 1990, oriole company completed the construction of a building at a cost of $1,060,000 and first occupied it in january 1991. it was estimated that the building would have a useful life of 40 years and a salvage value of $32,000 at the end of that time. early in 2001, an addition to the building was constructed at a cost of $265,000. 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 salvage value of $11,000. in 2019, it is determined that the probable life of the building and addition will extend to the end of 2050, or 20 years beyond the original estimate.