Below I wrote out the problem and attached pictures on what i am having problems with I have to find the straight line, units of production, and the DDB

A machine costing $213,800 with a four-year life and an estimated $17,000 salvage value is installed in Luther Company's factory on January 1. The factory manager estimates the machine will produce 492,000 units of product during its life. It actually produces the following units: 122,900 in Year 1, 122,500in Year 2, 121,200in Year 3, 135,400in Year 4. The total number of units produced by the end of Year 4 exceeds the original estimate?this difference was not predicted. (The machine cannot be depreciated below its estimated salvage value.)

Straight Line Units of Production DDB Compute depreciation for each year (and total depreciation of all years combined) for the machine under the Straight-line depreciation. Straight-Line Depreciation Year Depreciation Expense 2 3 4 Total S 0Straight Line Units of Production DDB Compute depreciation for each year (and total depreciation of all years combined) for the machine under the Units of production. Units of Production Year Units Depreciable Depreciation Depreciation Units per unit Expense 1 122,900 2 122,500 3 121,200 4 135,400 Total 0- - Units of Straight IJI'IE DUB Compute depreciation for each veer [and tubal depreciation of all veers combined) for the machine under the Double decliningbalance