Reshma wishes to mix two types of food P and Q in such a way that the vitamin
contents of the mixture contain at least 8 units of vitamin A and 11 units of
vitamin B Food P costs Rs 60/kg and Food Q costs Rs 80/kg Food P contains
3 units/kg of Vitamin A and 5 units / kg of Vitamin B while food Q contains
4 units/kg of Vitamin A and 2 units/kg of vitamin B Determine the minimum cost
of the mixture