American Manufacturing installs a manufacturing machine in its factory at the beginning of the year at a cost of $75.000. The machine's useful life is estimated at 5 years, or 1.000,000 units of product with a $15,000 salvage value. During its second year, the machine produces 250,000 units of product. Required: Determine the machine's second year depreciation under the (1) straight line, (2) units of production and (3) double-declining balance methods