I am having trouble solving this question

A machine costing $207,200 with a four-year life and an estimated $16,000 salvage value is installed in Luther Company's factory on January 1. The factory manager estimates the machine will produce 478,000 units of product during its life. It actually produces the following units: 123,000 in 1st year, 124,200 in 2nd year, 120,200 in 3rd year, 120,600 in 4th year. The total number of units produced by the end of year 4 exceeds the original estimate-this difference was not predicted. (The machine must not be depreciated below its estimated salvage value.) Required: Compute depreciation for each year (and total depreciation of all years combined) for the machine under each depreciation method. (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 DDB Straight Line Compute depreciation for each year (and total depreciation of all years combined) for the machine under each Straight-line depreciation. Straight-Line Depreciation Depreciation Expense Year 2 3 4 S Total Units of Straight Line DDB Propuction Compute depreciation for each year (and total depreciation of all years combined) for the machine under each Units of production. Units of Production Depreciation per unit Depreciable Units Depreciation Expense Year 2 3 4 $ Total 0 Prev 1 of 1 Next Units of Straight Line DDB Production Compute depreciation for each year (and total depreciation of all years combined) for the machine under each Double- declining-balance. DDB Depreciation for the Period End of Period Beginning of Period Book Depreciation Expense Depreciation Rate Accumulated Book Value Year Depreciation Value $ 0 % 1 % 2 C % 3 % 4 C Units of Production