When you're making a grocery run and need to pick up a carton of eggs for that perfect fried egg you eat every morning or ...

It's right there in plain sight, but most shoppers have no idea what the code on their egg carton actually means, or why it's important. Do you?

Add Yahoo as a preferred source to see more of our stories on Google. Know the difference, become an eggs-pert, and save money. Simply Recipes / Getty Images When I go to the grocery store to buy a ...