In western Kansas, corn can be grown in two ways - with or without irrigation. Dryland farmers, who do not irrigate their corn, have long-run average costs of L A CD= Q^2-20 Q 105 and long-run marginal costs of L M CD=3 Q^2-40 Q 105, where Q is measured in thousands of bushels. Farmers lucky enough to have water rights or river access have lower costs: Their long-run average cost is L A CI=Q^2-16 Q 67 and their long-run marginal costs are L M CI=3 Q^2-32 Q 67. | Numerade