Yukelson Company owns the building occupled by its administrative office. The office building was reflected in the accounts at the end of last year as follows: 341.000 Cost when acquired Accumulated depreciation (based on straight-line depreciation, an estimated life of 50 years, and a $1,000 residual value) 74,400 During January of this year, on the basis of a careful study, management decided that the total estimated useful life should be changed to 30 years (instead of 50) and the residual value reduced to $20,000 (from $31,000)). The depreciation method will not change. Required: 1. Compute the annual depreciation expense prior to the change in estimates. Depreciation expense 2. Compute the annual depreciation expense after the change in estimates, Depreciation expense