A machine costing $210,800 with a four-year life and an estimated $20,000 salvage value is installed in Luther Company's factory on January 1. The factory manager estimates the machine will produce 477,000 units of product during its life. It actually produces the following units: 122,700 in 1st year, 123,900 in 2nd year, 120,500 in 3rd year, 119,900 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.

Compute units of production

Compute DDB Depreciation for the period & end of period