A person invested 20% of his salary in a business and at the end of year he got profit of 30%. Next year, if the salary of the person is increased by 20%, then he increases his investment percent by 50% and at the end of year he got profit of 25%. After the end of two years he donates 3000 which is equal to 25% of his 2 years profit. Then find the investment of the person in first year.