On January 2, 2018, Archer Company, a skateboard manufacturer, installed a computerized machine in its factory at a cost of $150,200. The machine?s useful life was estimated at four years or a total of 186,000 units with a $20,000 trade-in value. Archer Company?s year-end is December 31. Calculate depreciation for each year of the machine?s estimated useful life under each of the following methods:

a. Straight-line

b. Double-declining-balance

c. Units-of-production, assuming actual units produced were:

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Year 2020 2021 2018 2019 41,300 57,000 Units 38,400 52,700