Michael (single) purchased his home on July 1, 2012. He lived in the home as his principal residence until July 1, 2020, when he moved out of the home, and rented it out until July 1, 2021, when he moved back into the home. On July 1, 2022, he sold the home and realized a $310,000 gain. What amount of the gain is Michael allowed to exclude from his 2022 gross income?