(14). Omar Company purchased machinery on January 1, 2019, for $60,000. The machinery is estimated to have a residual value of $6,000 after a useful life of 8 years. (a). Compute 2019 depreciation expense using the straight-line method. (1.25 mark) (b). Compute 2019 depreciation expense using straight-line method, assuming the machinery was purchased on September 1, 2019. (1.25 mark)