Compute depreciation for each year and total depreciation of all years combined for the machine under the units of production a machine costing $207,400$ with the four year life and an estimated $17,000$ salvage value is installed in Luther companies factory on January $1$ the factory manager estimates the machine will produce $476,000$ units of product during its life and actually produces the following units $122,600$ and year one $123,800$ year two $120,700$ year three $118,900$ and year four the total number of units produced by the end of year for the original estimate this difference was not predicted no the machine cannot be depreciated below its estimated salvage value the depreciation for each year and total depreciation of all years combined for the machine under each depreciation method