Allison will graduate from high school next June. She has ranked her three possible postgraduation plans in the following order: (1) work for two years at a consulting job in her hometown paying $20,000 per year, (2) attend a local community college for two years, spending $5,000 per year on tuition and expenses, and (3) travel around the world tutoring a rock star’s child for pay of $5,000 per year. What is the opportunity cost of her choice?