Opportunity Cost. Scarcity. The most basic economic problems People want more then there is. Resources are limited Wants are unlimited. Examples of Scarcity. Money: Want to go see a movie? You have $10.00, but the movie costs $10.50 Time: Finish homework and play video games before bed
Extra benefit of adding one more of something.
What if I wanted to make ONE more pan of pasta sauce?
What is the benefit?