Direction: P, Q and R started a business by investing Rs. 1200, Rs. 2000 and Rs. 2400 respectively. After a quarter, they invested amounts in the ratio 1 : 4 : 2. After another quarter, they invested amounts in the ratio 3 : 2 : 3. In the last quarter, the ratio of investments was same as in 2^nd quarter. Also, in the last quarter, the respective amounts of P, Q and R were double than the respective amounts invested in 2^nd quarter. The total investment of R before 4^th quarter was Rs. 1800 more than that of P during same duration. Also, the ratio of R’s share in profit to total profit at the end of year was 69 : 206. Also, they withdrew the amount after each quarter.