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: (Do not round intermediate calculations.) a. Straight-line b. Double-declining-balance c. Units-of-production, assuming actual units produced were: Year 2018 2019 2020 2021 Units 38,400 41,300 52,700 57,000 Year 2018 2019 2020 2021 Total Straight Line Double Declining-Balance Units of Production