On January 2, 2018 Archer Company, a skateboard manufacture, 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