30) On January 1, 2018, Forrest Manufacturing Company purchased a machine for $40,000,000. The company expects to use the machine for 24,000 hours over the next six years. The estimated residual value of the machine at the end of the sixth year is $40,000. The company used the machine for 3,600 hours in 2018 and 5,000 hours in 2019. What is the depreciation expense for 2018 and 2019 if the company uses the double-declining-balance method of depreciation? I 7