Colquhoun International purchases a warehouse for $310,000. The best estimate of the salvage value at the time of purchase was $15,000, and it is expected to be used for twenty-five years. Colquhoun uses the straight-line depreciation method for all warehouse buildings. After four years of recording depreciation, Colquhoun determines that the warehouse will be useful for only another fifteen years. A. Calculate annual depreciation expense for the first four years. 11,800 B. Determine the depreciation expense for the final fifteen years of the asset's life. C. Prepare the journal entry for year five. If an amount box does not require an entry, leave it blank. Feedback Check My Work When revising deprecation schedules, the book value is used as the adjusting base to apply the new changes to when determine the revised yearly depreciation amount