Machinery purchased for $69,000 by Vaughn Co. in 2016 was originally estimated to have a life of 8 years with a salvage value of $4,600 at the end of that time. Depreciation has been entered for 5 years on this basis. In 2021, it is determined that the total estimated life should be 10 years with a salvage value of $5,175 at the end of that time. Assume straight-line depreciation