the end of year 4 exceeds the original estimate-this difference was not predicted. (The machine must not be depreciated estimated salvage value.) Required: Compute depreciation for each year (and total depreciation of all years combined) for the machine under each depreciation (Round your per unit depreciation to 2 decimal places. Round your answers to the nearest whole dollar.) Complete this question by entering your answers in the tabs below. Units of Production Straight Line es DDB Compute depreciation for each year (and total depreciation of all years combined) for the machine under each Units of production. Units of Production Depreciation Expense Depreciable Units Depreciation per unit Year 121,700 123,000 1 2 120,300 3 139,000 4 504,000 Total DDB> 3 of 3 3 of 3