Simmons Corp. purchased a machine for $50,000 on January 1, 2015. At that time, Simmons estimated that the machine would have a useful life of ten years and a salvage value of $4,000. On January 1, 2020, Simmons learned that a new type of machine will make the machine it purchased in 2015 obsolete at the end of 2022. Therefore, on January 1, 2020 Simmons estimates the machine has a three-year remaining useful life with no salvage value. What amount of depreciation expense should Simmons record on the machine in 2020?