ANC fertilizer company produces chemicals mixed called NH3 which is used for the production of fertilizers by fertilizer companies in Nigeria. It is known that production of a certain chemical mixed must contain 140mg chloride, 96mg nitrites and 105mg sulphate. The company can use 2 substances X and Y plus a base which is cost less to make a chemical. Substance X contain 7mg of chloride, 3mg of nitride and 3mg of sulphate. Substance Y contain 3mg of chloride, 4mg of nitrite and 6mg of sulphate. It cost the company N10 per unit to produce X and N15 per unit to produce Y substance. It is required to produce the mixed using substances X and Y, so that the total cost is minimized.

REQUIRED: 1. Formulate this problem into linear programming (LP) 2. Solve the problem formulated to obtain number of grams of each substances X and Y required in the mixture using Graphical Approach 3. What is the total minimum cost