Brief Exercise 11-2 Depreciation methods [LO11-2] On January 1, 2018, Canseco Plumbing Fixtures purchased equipment for $30,000. Residual value at the end of an estimated four-year service life is expected to be $2,000. The company expects the machine to operate for 10,000 hours. The machine operated for 2,200 and 3,000 hours in 2018 and 2019 , respectively. a. Calculate depreclation expense for 2018 and 2019 using straight line method. b. Calculate depreciation expense for 2018 and 2019 using sum-of-the-years'-digits method. c. Calculate depreclation expense for 2018 and 2019 using double-declining balance method. d. Calculate depreciation expense for 2018 and 2019 using units-of-production method (using machine hours)