The cоuntry оf Argоniа аnd the country of Beryliа imposed tariffs on imports from all countries. They set up a free trade area, removing all trade barriers between themselves but maintaining tariffs on imports from the rest of the world. Argonia now begins to import sugar from Berylia. Previously, Argonia was indigenously producing sugar at a higher cost. Thus, Argonia benefits from this transaction. This is known as _____.