Gary and Gertrude are married on April 8, 2015. They use Gertrude's home as their residence. Gertrude purchased the home on November 14, 2013, for $60,000. On February 19, 2016, Gertrude is killed in an automobile accident. Gary is distraught and sells their residence on May 14, 2016 for $110,000 and moves to Portugal. How much of the gain on the sale of the residence is taxable?