On the way to class you notice a penny on the floor. Is it worth your time to stoop down and pick it up? Answer this by comparing the monetary value of the penny with the nutritional value it could buy, and the energy required to stoop down and pick it up.
A. Yes, worth it
B. No, not worth it
C. No, because I'm independently wealthy and have no need of money
D. No, because I plan to live with my parents the rest of my life.


Corollary: Bill Gates spots a $100 bill on the sidewalk. Is it worth his time to pick it up?