How can one know if toilet paper is a good buy with mega large double ultra size rolls how can you possibly know what is the best buy?

Here is a tip to look for when shopping for anything in a grocery. Take the time to look at the shelf tag. It will state, among other things, the price per ounce or price per unit of the merchandice. It will also state the price of the product in big numbers, but somewhere on that tag will be the price for a unit of the product. You can compare value that way..check the different items by the weight or comparison of price per sheets.