Cb$.$ book value and the current market value of the asset.c$.$ revenues earned by the asset and the cost of the asset.d$.$ salvage value of the asset and the future market value of the asset$\mathrm{.}4.$ At the beginning of last year, Drake Corporation purchased equipment for $$34,000.$ The equipment has a useful life of $5$ years or $100,000$ hours. The estimated residual value is $$4,000.$ Drake used the equipment for $22,000$ hours last year and $25,000$ hours this year.Depreciation expense for year $2$ using DDB and UOP would be: