In 2019, Taxpayer sold machinery with a fair value of $80,000 to an unrelated party who agreed to pay $20,000 in 2019 plus $20,000 in June of each of the next three years with interest. The machinery had an initial basis of $50,000 and accumulated depreciation of $26,000 at the sale date for an adjusted basis of $24,000. Determine the total gain Taxpayer must recognize in 2019 under the installment method.