.AlthoughtheUnitedStatesisamajorproducerofsugar,itconsumesmorethanitcanproduceinternallyandthusmustimportsugar.Third,onenationcansellsomeitemsatalowercostthanothercountries.Japanhasbeenabletoexportlargequantitiesofradiosandtelevisionsetsbecauseitcanproducethemmoreefficientlythanothercountries.ItischeaperfortheUnitedStates...