Computing Depreciation with a Change in Depreciation Method Whitney Company purchased equipment on January 1 of Year 1 for $90,000. This equipment has a useful life of 6 years and a residual value of $5,000. The company uses the double-declining-balance depreciation method. On January 1 of Year 4, the company changes its depreciation method to the straight-line method. Compute depreciation expense for Year 4. Note: Carry all decimals in calculations; round the final answer to the nearest dollar. Depreciation expense for Year 4: $ 0