On January 2, 2018, Archer Company, a skateboard manufacturer, Installed a computerized machine in its factory at a cost of $173,200. The machine's useful life was estimated at four years or a total of 185,600 units with a $34,000 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 Year 2018 2019 2020 2021 Total 2018 2019 2020 2021 39,800 43,400 54,100 71,000 Straight-Line Double-Declining-Balance Units-of-Production k