Sanjay and Sanjeev started a business by investing money in the ratio 5 : 3. After 3 months, Manish joined them by investing an amount equal to the amount invested by Sanjeev. At the end of the year the business has a profit of Rs.82,000. The profit (in Rs.) of Manish is :

20,000 24,000 18,000 27,000

18,000