I am going to post some of my canning expereience here, just in case anyone else tried their hand at this. One of the things that I have found is that I don't always know how much to buy. So, I canned carrots yesterday and bought a 5 pound bag and it gave me 8 pints once they were canned.
We bought a box of pears, which I think is around 30 pounds, and we got 27 pints of sliced pears and 6 pints of pear sauce (like applesauce). We had about 9 pears that were bad so we could have had more. We got a really good discount on the pears since they were ripe.