On January 1, 2017, Shamrock Company purchased a building and equipment that have the following useful lives, salvage values, and costs. Building, 40-year estimated useful life, $46,400 salvage value, $869,200 cost Equipment, 12-year estimated useful life, $9,600 salvage value, $105,000 cost The building has been depreciated under the double-declining-balance method through 2020. In 2021, the company decided to switch to the straight-line method of depreciation. Shamrock also decided to change the total useful life of the equipment to 9 years, with a salvage value of $5,200 at the end of that time. The equipment is depreciated using the straight-line method. (a) Prepare the journal entry necessary to record the depreciation expense on the building in 2021. (Round answers to 0 decimal places, e.g. 125. Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts.) Account Titles and Explanation Debit Credit (b) Compute depreciation expense on the equipment for 2021. (Round answers to 0 decimal places, e.g. 125.) 2021 Depreciation expense $