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.)

1. Straight-line
2. Double-declining-balance
3. Units-of-production, assuming actual units produced were:

Year2018201920202021Units39,80043,40054,10071,000