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Sketches inc puichined a machine on lancary 1, 20s6. The cost of the machine was $47000, ths estimsted residual value was $15.000 of the end of an estimated 5 year life. The company expects to produce a todal of 20,000 unis. The compuny produced troo units in 2016 and 2.190 unts in 2017. Required: a. Calculate depreciation expense for 2016 and 2017 using the straght-line method. Calculate the depreciation expense for 2016 and 2017 using the units-of-production b. method. (Do not round your intermediate calculations. Round your final answers to the nearest whole dollar.) Caicuate the deprecation expense for 2016 and 2017 ining tee untsiforoduction. the nearest whole dollar) c. Colculate depreciation expense for 2016 through 2020 using the double-declining batance method. (Round your final anwwer to nearest dellar value)