Imagine your car broke down sometime somewhere. As you were looking for a mechanic's number, a kind and nice person approached and offered help. He looked at the engine, went back to his car to bring his toolbox, and then he fixed your car in less than half an hour. After thanking him, you asked: "Thank you so much! What can I do for you in return of your favor"? And he said, just pay me $450. Based on what you have learned in this course (about contract), what do need to do. Explain what law suggests you