(5 4 = 20) An oil company produces two grade of gasoline P and Q which it sells at 30 and 40 per litre. The company can buy four different crude oils with the constituents and cost given as: Crude oil 1 2 3 4 Constituents A B 0.75 0.15 C 0.10 0.20 0.30 0.50 0.70 0.10 0.20 0.40 0.10 0.50 Price/ Lit. D 20.0 22.5 25.0 27.5 Gasoline P must have at least 55% of A and not more than 40% of C, gasoline Q must not more than 25 of C. formulate the problem to determine the use of crude and to maximize the profit. umptions in LPP?