Is Whole Foods exempt from listing unit price?
I doubt it.
There is a supermarket a couple of 100 yards from here, so I went over there, where I learned the following.
Sale items are exempt from the requirement to display the unit price.
The unit price on one brand of chickpeas was expressed as dollars per ounce. Next to it was another brand of chickpeas whose unit price was expressed in dollars per can.
Hope that helps.
People on this board have talked about programming as a gear in your brain that, to a first approximation, you have or you don't. I'm wondering if there's some well put-together resource you can direct someone with zero experience and just a web-browser to and say "if you're having fun an hour from now, you have the gear, good luck" -- maybe something on Khan academy?
(I learned to program a long time ago, and I started with BASIC program listings in my math textbook -- I don't actually know what the optimal onramps are now.)