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10. Sunk costs and decision making Yakov has plans to go to a play and already has a $50 nonrefundable, nonexchangeable, and nontransferable ticket. Now Ana, whom Yakov has wanted to date for a long time, asks him to a party. Yakov would prefer to go to the party with Ana and forgo the play, but he doesn't want to waste the $50 he spent on the play ticket. From the perspective of an economist, if Yakov decides to go to the party with Ana, what has hejust done? 0 Correctly ignored a sunk cost 0 Made a choice that was not optimal O Incorrectly allowed a sunk cost to inuence his decision