On January 2,1998 , a new machine was acquired for \(\$ 900,000\). The machine has an estimated salvage value of \(\$ 100,000\) 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 1998 and 1999 using each of the following methods:

a. Straight line.

b. Units of production (assume 30,000 and 60,000 units were produced in 1998 and 1999, respectively).

c. Sum of the years' digits.

d. Double-declining balance.