One thing I like about the Safeway food chain is that they do a lot of math for you and are perfectly willing to put it in a useful reference location. On all the shelf-labels for paper towels, for example, there's a price per sheet. On all the shelf-labels for fiber capsules, there's a price per capsule. Oddly enough, a lot of the things that are packaged to look inexpensive (just one color on the box, for example, or very plain fonts) are not cheap by comparison to their competition!

But they don't do dollar per calorie on TV dinners. Fortunately, that's usually pretty easy math. Above a penny per calorie is just not worth paying. I can go to a cheapy restaurant for that price! Half a penny is getting pretty good, especially if it's not all fat and starch.