PROBLEM I. The Jason Knife Co. purchased a machine on January 1, 2018. The machine cost $495,000. It had an 2018, Jason estimated life of ten years, or 25,000 units, and an estimated residual value of $45,000. In produced 3,000 units. Required: Compute the depreciation charge for 2018 using each of the following methods: a. b. c. d. double declining balance units of output sum of the years' digits straight line