'Aman', 'Bittu' and 'Charu' started a business together such that 'Aman' invested a 40% of the total capital invested by 'Aman', 'Bittu' and 'Charu' together, 'Bittu' invested 40% of the remaining capital and 'Charu' invested the rest, then determine the profit share of 'Charu' given that the business earned a profit of Rs. 2,25,000 at the end of the year.