At first, Luke doesn’t want to go to Alderaan, as he needs to stay at home with his aunt and uncle. When Luke discovers that his Aunt Beru and Uncle Owen have been killed by Empire, he now has nobody at home. The opportunity cost to Luke of leaving Tatooine is lower now that his Aunt and Uncle have died. Opportunity cost is the value of the opportunity forgone (in Luke’s case, the value of him staying on Tatooine). Learn more about Opportunity Cost in this clip!