The Production Possibility Frontier

🌿 Opportunity Cost / Economic Cost

👉 what you give up to get something else.

Example using PPF:

• At Point B: 1 unit of corn and 9 units of cotton
• At Point C: 2 units of corn and 7 units of cotton

Moving from B → C:

• Gain: +1 unit of corn
• Give up: −2 units of cotton

✅ So, the opportunity cost of 1 extra unit of corn = 2 units of cotton

⚠️ Important:
When resources are fully used, producing more of one good always requires sacrificing some amount of another good.