Your grandmother gave you $200 for your birthday, which you invested in a mutual fund on January 1, 2012. On June 1, 2012, she gave you $610 for your high school graduation, which you immediately deposited into your mutual fund. On January 1, 2013, found that your dollar-weighted rate of return for the previous year was 6.2%. On April 1, 2013 your fund balance was $1500, and you then deposited $X, which your grandmother gave you for college. On January 1, 2014, your fund balance was $2300, and you calculated that your time weighted rate of return for the previous year was 10.3%. What is X?