What is opportunity cost, and how is it different from accounting cost? Give an example of how the Principle of Opportunity Cost applies to your life. Think of a recent decision you made. It could be a decision as simple as whether to eat out or cook at home. Or, it could be a decision to quit your job and go back to school. What alternatives did you consider? How did you arrive at your final decision? Did you implicitly weigh marginal cost and marginal benefit? How does the concept of opportunity cost apply to production possibilities curve (PPC) analysis? How can we use PPC analysis to examine the opportunity cost of what we do?