What if everybody else sees things upside-down, or more accurately, what if I'm the only person on the planet who sees things upside-down?

Why do things always cost $19.99 or something like that, but hardly ever $20? Do they think I can't round up and realize that even though it starts with a 1 it's still really about $20?

Why is there no blue food? (and don't say blueberries, because they're purple dammit!)