I walked up to the post office. The lady said they only do one hand cancel per customer, per day... shucks. I think she was lying because I heard differently a few months ago. Anyway, she did say that it will cost $.75 to mail each invitation and they will not go through the machine at all. They will put them separetely with the Parcel mail. So that's good news. I'm a little shocked at the stamp price, but I expected it to be slightly higher since the envelopes contain the invite, and two inserts. She tried to get me to buy the stamps, but they were ugly, so I'm going to the web to see if I can find pretty stamps.