Depreciation computations: change in estimate. Aussie Imports purchased a specialized piece of machinery for $50,000 on January 1, 20X3. At the time of acquisition, the machine was estimated to have a service life of 5 years (25,000 operating hours) and a residual value of $5,000. During the 5 years of operations (20X3 - 20X7), the machine was used for 5,100, 4,800, 3,200, 6,000, and 5,900 hours, respectively.
Question:
On January 1, 20X5, management shortened the remaining service life of the machine to 15 months. Assuming use of the straight-line method, compute the company's depreciation expense for 20X5.
I think that the company has a $9,000 depreciation expense for 20X5 but don't completely understand. Could you explain in the straight-line method pleases?