When I food shop, I always buy the cheapest brand of whatever I need. There are a few exceptions, like Dorito's, none of their competitors have been able to even come close to matching their delicious crispy crunchy cheesiness. But for the most part I have learned to quickly break down the cost by unit (oz., piece, lb., slice of beef jerkey per bag, whatever) and I buy the cheapest.
My method works, pretty much, perfectly for all of the aisles in the store except one; the Toilet Paper aisle. Man, this is the most confusing aisle in the whole store. First of all, I hear all kinds of talk on the news about people complaining to congress and their senators about the price of oil and gasoline, but has anyone ever stopped to take a look at the price of toilet paper these days? It's unbelievable. Not only is it expensive, it is also difficult to break down the unit price. They have "regular rolls", "giant rolls" and "big rolls" and that is just for the standard Charmin with the red packaging. How am I supposed to break down the unit price for that to comparitive shop?
The other thing I noticed about the toilet paper is that, at least in the Publix I shop at, all the different brands are priced pretty much exactly the same. A 12 pack of Charmin is the same price as a 12 pack of Cottonelle. Is there some type of OPEC like organziation that runs the toilet paper industry where they control prices so there is no free market?