On Januayy 2,2021. Archer Company, a skateboard manufocturef, installed a compoterized machine in its factory at a cost of $150,200. The machine's useful iffe was estimated at four years of a total of 186,000 units with a $20,000 tradeuin vatue. Archer Company's year-end is December 31 Calculate depreciation for each yoar of the machine's estlmated useful life under each of the following methods: (Do not round intermediate calculations.) a. Straight-fine b. Double-declining-bulance c. Units-of-production, assuming actual units produced were