On January 2, 2018, Archer Company, a skateboard manufacturer, installed a computerized machine in its factory at a cost of $170,600 The machine's useful life was estimated at four years or a total of 179,500 units with a $27,000 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 (Do not round intermediate calculations.) a. Straight-line b. Double-declining-balance c. Units-of-production, assuming actual units produced were Year Units 2018 39,100 2019 42,350 2020 53,400 2021 64,000 Year 2018 2019 2020 2021 Total Straight Line Double Declining Balance Units of Production 134,700 98 800 62.900 27.000 $ 170 600 $ $ $ $