On January 2, 2018, Archer Company, a skateboard manufacturer, installed a computerized machine in its factory at a cost of $155,800. The machine's useful life was estimated at four years or a total of 190,000 units with a $38,000 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 10,200 2019 44,000 2020 54,500 2021 75,000 Straight-Line Double Declining-Balance Units of Production Year 2018 2019 2020 2021 Total