A machine costing $215,600 with a four-year life and an estimated $18,000 salvage value is installed in Luther Company's factory on January 1. The factory manager estimates the machine will produce 494,000 units of product during its life. It actually produces the following units: 122,200 in 1st year, 122,700 in 2nd year, 121,100 in 3rd year, 138,000 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.) Straight Line Units of Production DDB Compute depreciation for each year (and total depreciation of all years combined) for the machine under Straight-line depreciation. Straight-Line Depreciation Year Depreciation Expense 1 Total Straight Line Units of Production DDB Compute depreciation for each year (and total depreciation of all years combined) for the machine under Units of production. Year Units of Production Depreciable Depreciation Units per unit Depreciation Expense Total Straight Line Units of Production DDB Compute depreciation for each year (and total depreciation of all years combined) for the machine under Double-declining- balance. End of Period DDB Depreciation for the Period Beginning of Depreciation Depreciation Period Book Rate Value Expense Year Accumulated Depreciation Book Value