The Jefferson Co. purchased a machine on January 1, 2016. The machine cost $595,000. It had an estimated life of ten years, or 30,000 units, and an estimated residual value of $40,000. In 2016, Jeffries produced 3,000 units.

Required

Compute the depreciation charge for 2016 using each of the following methods:

a. Double declining balance method

b. Activity method (units of output)

c. Sum of the years’ digits method

d. Straight line method