A started business by investing Rs. 6000. After 8 months B joins the business and then after 2 months C joins the business. If the ratio of the profit at the end of the year is 18: 8: 5. Find the sum of the investment made by Person B and C.
1
Rs. 21500
2
Rs. 17500
3
Rs. 18000
4
Rs. 16000
5
Rs. 16500