Two types of milk i.e.type A and type B sold by a milkman. The milkman buys pure milk at the rate Rs. 70 per liter and water is free of cost. The ratio of the quantity of milk to water in type A and in type B is 4 : 3 and 5 : 2 respectively. Milkman mixed type A and type B in the ratio of 1 : 2 respectively and sold the mixture at Rs. 60 per liter. Find the profit earned by the milkman by selling the mixture type A and type B if he took 140 liters of type A?