On January 1, 2018, a machine was purchased for $105,000. The machine has an estimated salvage value of $8,100 and an estimated useful life of 5 years. The machine can operate for 114,000 hours before it needs to be replaced. The company closed its books on December 31 and operates the machine as follows: 2018, 22,800 hrs; 2019, 28,500 hrs; 2020, 17,100 hrs; 2021, 34,200 hrs; and 2022, 11,400 hrs.