A and B started a business in partnership by together investing Rs. 12 lakhs. After 4 months, C joined them by investing Rs. 5 lakhs. After 2 more months, A increased his investment by 50%, while B withdrew Rs. 2 lakhs from his investment. At the end of the year, if the profit received by C is (50/3)% less than that of B, then find the difference between the initial investment of A and B.