Mind your P's and Q's

Have you ever heard the saying, "mind your p's and q's"? It's one of those things that mothers tell their children. Even though it seems completely unrelated, the general consensus is that it means mind your manners. Or say your p's (pleases's) and q's (thank you's). 


As I've been studying for my Ag Econ final for the past week or so, I've come up with a new theory on this old saying. Mind your p's (prices) and q's (quantities)!

Just another random thought from a college freshman experience diminishing returns after studying too long.