George is a U.S. citizen who is employed by Hawk Enterprises, a global company. Beginning on June 1, 2015, George began working in London. He worked there until January 31, 2016, when he transferred to Paris. He worked in Paris the remainder of 2016. His salary for the first five months of 2015 was $100,000, and it was earned in the United States. His salary for the remainder of 2015 was $175,000, and it was earned in London. George's 2016 salary from Hawk was $300,000, with part being earned in London and part being earned in Paris.
What is George's gross income in 2015 and 2016? (Assume that the 2016 indexed amount is the same as the 2015 indexed amount.)