A, B and C start a venture with investments of Rs. 12000, Rs. 16000 and Rs. 10000 respectively. A left after 2 months. B left after another 2 months at that time A rejoined with only 2/3rd of his original investment. A month later B rejoined with one quarter less than his original investment. C remained throughout the year. The profit at the end of the year was Rs. 267000. How much more did B earn than A?