A sum (in Rs.) is distributed between A, B and C in the ratio 9 : 6 : 11. If A gives Rs. 500 from his share to C, the ratio of shares of A, B and C becomes 4 : 3 : 6. What is the sum of shares of B and C, in the beginning?
ARs. 9,100
BRs. 8,500
CRs. 7,500
DRs. 7,800