Tristen Company purchased a five-story office building on January 1, 2019, at a cost of $5,000,000. The building has a residual value of $200,000 and a 30-year life. The straight-line depreciation method is used. On June 30, 2021, construction of a sixth floor was completed at a cost of $1,650,000. Required:
Calculate the depreciation on the building and building addition for 2018 and 2019 assuming that the addition did not change the life or residual value of the building.

Depreciation expense on Building

Depreciation expense per annum under straight line method = (Cost - Residual value) / Useful life

= ($5,000,000 - $200,000) / 30

= $4,800,000 / 30

= $160,000

Depreciation expense for 2018 = $160,000

Depreciation expense for 2019 = $160,000

Depreciation expense on Building addition

Useful life = 30.00 years - 2.50 years = 27.50 years

Depreciation expense per annum under straight line method = (Cost - Residual value) / Useful life

= ($1,650,000 - $0) / 27.50

= $60,000

Depreciation expense for 2018 for 6 months = $60,000 * (6/12) = $30,000

Depreciation expense for 2019 = $60,000

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