On January 1st, 2015, AMD Company purchased a machine for $350,000. The estimated useful life of the machine is estimated to be 5 years with an estimated residual value of $50,000. The machine's productive life in hours is estimated to be 50,000 hours. The following are the machine hours used by AMD. Year Hours used 2015 10,000 2016 9,000 2017 11,000 2018 12,000 2019 8,000 Find out the depreciation expense each year using activity method