A sum of money was divided between Tarun, Raghav and Kapil in the ratio 7 ∶ 4 ∶ 9. But, Kapil gave 1/3 of his share each to Tarun and Raghav. If Tarun received Rs. 1800 more than Raghav, then what is the total sum of money?
ARs. 6000
BRs. 9000
CRs. 12000
DRs. 15000