"Only buy the 8X10 print. It will cost you like $10 bucks and once you get it, scan it and reprint in wallet sizes on your photo printer. It is a little more legwork on your end, but the savings can be significant. My wife and I have been doing this for years and we estimate we save about $60 per picture day because of it. (We have a lot of relatives who all "Have to" have a pic)"
Be careful with this, as it is a violation of copyrights. Some people don't care, but others do. Many photo stores will not print these images if you ask, because it is in violation of copyright.