Company A had purchased machinery 3 years ago at the beginning of 2013 and depreciated it using the straight-line depreciation method until the end of 2015. Subsequent to year end Company A determined that the useful life of the machinery was going to be a total of 7 years rather than the 5 years they originally estimated. The machinery was originally purchased for $41,000 and had a $4,400 estimated initial residual value. In addition to the useful life now being a total of 7 years, the residual value has been revised to an estimated $1,400.

Calculate the original annual depreciation expense prior to the revision in estimates.

The original annual depreciation

$ /year

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Calculate the revised annual depreciation expense for the remainder of its useful life.

The revised annual depreciation

$ /year