On 2009 January 2, a new machine was acquired for USD 900,000. The machine has an estimated salvage value of USD 100,000 and an estimated useful life of 10 years. The machine is expected to produce a total of 500,000 units of product throughout its useful life. Compute depreciation for 2009 and 2010 using each of the following methods:
a. Straight line.
b. Units of production (assume 30,000 and 60,000 units were produced in 2009 and 2010, respectively).
c. Double-declining balance