Q21. A dietician wishes to mix two types of food in such a way that the vitamin contents of the mixture contain atleast 8 units of vitamin A, and 10 units of vitamin C. Food I contains 2 units/kg of vitamin A and 1 unit/kg of vitamin C. Food II contains 1 unit/kg of vitamin A and 2 units/kg of vitamin C. It costs ₹50 per kg to purchase food I and ₹70 per kg to purchase food II. Determine the minimum cost of such a mixture.

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