On January 1, 2018, Betty DeRose, Inc. purchased equipment for $95,000. The equipment was assigned an estimated life of 15 years and a salvage value of $12,500. On January 1, 2021, Betty DeRose decided the life of the equipment should be changed from 15 to 25 years with a salvage value of $5,900 at the end of the 25 years. Betty DeRose uses the straight-line method to depreciate its assets.

Calculate the book value of the equipment at December 31, 2023.

I tried working on this for a while and I just need a little help. I'd greatly appreciate any assistance.