On October 1, 2017, John Oak a sole-proprietor, purchased a machine for 20000 to use in his business this was the only purchase he made fir the year. on December 4,2019, he sold the machin for $21000. john Oak us a calendar year taxpayer. he dud nit elect section 179 expense or bonus depreciation. compute the adjusted basis, the amount of gain or loss realize, and, determine the character of the gain or loss on the sale.?