I am terrible at estimating how much meat I need for a crowd. This is a small crowd. A buddy of mine is having a birthday coming up soon and I'm helping his wife with some of the food. The party will be later so we're just having some pickup foods for people to munch on. For the sake of this determination, I'm estimating around 40 people. I'm doing butts and we're going to pre-make little sandwiches on those little country rolls that everybody is familiar with I'm sure. So how much should I do? I really need to get a good digital scale for my cooking to keep up with stuff like this and how much I get off butts, etc. Thanks for any help anyone can offer.