Tristen company purchased a five-story office building on january 1, 2022, at a cost of $4,770,000. the building has a residual value of $225,000 and a 30-year life. the straight-line depreciation method is used. on june 30, 2024, construction of a sixth floor was completed at a cost of $1,595,000. required: calculate the depreciation on the building and building addition for 2024 and 2025, assuming that the addition did not change the life or residual value of the building. (hint: calculate depreciation for the building and addition separately. assume the addition has no residual value and an estimated life equal to the remaining useful life of the building.)