E and F invested Rs. 10,000 and Rs. 6,000 respectively in a business. After 3 months, E withdrew Rs. 2,000 while F added Rs. 4,000 to the business. After another 3 months, H entered into business with amount of Rs. 15,000. If profits equal to Rs. 31,500 are earned after 1 year, find F’s share in the total profits earned.