It will greatly depend on where you go. I don't know how this compares to others, but I went to JC Penney for our hair. There were 5 of us and the bill was just under $300 (not including a tip yet). I was very happy with how everyone's hair looked and it still looked great 12 hours later.I can't help you with make up as we all did our own that day. I have heard though that there is no charge from the make up counters in the mall though as long as you buy a product.
In my call around of salons updos run about 45 and up. Make up runs between 20 - 30. Unless you're willing to go to a beauty school, then it's about 25 for hair and 10 for make up.