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 lb
of nitrogen at $15/lb and up to 100 lb of silicon at $10/lb. Assuming that all
fertilizer produced can be sold, formulate an LP to help Bullco maximize profits