When I was a kid, the McDonald’s not too far from our home used to have a sign that would brag about how many burgers the chain had sold. I’m probably remembering wrong, but I recall the first number being something like 20 million burgers sold. It was probably more than that, but that’s what I remember.* And the number would change. A month later it would be 30 million sold, then 50 million sold, then 100 million sold, then 500 million sold and so on.