Chipotle Menu
Have you been to Chipotle? It’s delicious.
I was looking at the menu and started wondering how many calories were in the tortilla for the burrito, or how many calories were in the taco shell. Is it reasonable to ask these questions? Is there enough info?
To Accumulate a Rate --- Integrate! 
The Fermi question here is something like, “If every American ate every meal from Chipotle, how much added stress would be placed on the crust of the North American tectonic plate?”