On January 1, 2011, Jackson Company purchased a building and equipment that have the following useful lives, salvage values, and costs. The building has been depreciated under the double-declining-balance method through 2014. In 2015, the company decided to switch to the straight-line method of depreciation. Jackson also decided to change the total useful life of the equipment to 9 years, with a salvage value of $5,000 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 2015. (b) Compute depreciation expense on the equipment for 2015