Bullco blends silicon and nitrogen to produce two types of fertilizers. Fertilizer 1 must be at least 40% nitrogen and sells for $70/lb.
Fertilizer 2 must be at least 70% silicon and sells for $40/lb. Bullco can purchase up to 80 lbs. of nitrogen at $15/lb and up to 100 lbs. of silicon at $10/lb. Assuming that all fertilizer produced can be sold, formulate an LP to help Bullco maximize profits.