A, B and C are partners in a business. Their shares are in the proportion `1/3:1/4:1/5dot` A withdraws half of his capital after 15 months and after another 15 months, a profit of Rs. 4340 is divided. The share of C is `R s .1240` b. `R s .1245` c. `R s .1360` d. `R s .1550`