. What are the opportunity costs of food and suntan oil in Happy Land? . Why are the opportunity costs the same at each output level? . What are the opportunity costs of food and suntan oil in Active Land? . If each nation specialized where they have a comparative advantage, and then traded, nd the acceptable ranges for trade. 1 pound of food would have to trade between which values of suntan oil? 1 pound of suntan oil would have to trade between which values of food? . If each nation produces where they have a comparative advantage, and the terms of trade are 50 pounds of food for 75 gallons of suntan oil, how much will each nation prot by, compared to producing both good themselves? Happy Land Active Land