Karla wants to grow spinach. 1 pound of Fertilizer(F) produces 20 spinach or 1 pound of Manure(M) produces 30 spinach. They are perfect substitutes. So we know Q=20F+30M
Now Karla wants to produce 300 spinach at the least possible cost given that:
1 pound of Fertilizer costs $5 and 1 pound of Manure costs $10. explain to me how to minimize the cost.