I just wanted to let y’all know that when I read this last post to PD, she thought I was talking about callgirls.
After drying my eyes of tears from laughing so hard, I told her this was in actuality referring to a BABYSITTER.
Anyway, re: the OP . . . I’d think $50 would be more than fair. Keep in mind, though, that I have very little sense of money.
I’d go with the following equation:
Let X=number of kids. Let Y=your combined annual salary in thousands. (Y/2)*X + 25=Amt your babysitter should get.
From PD:
Iampunha is just wrong, but I’m used to that. 
Let the record show that when iampunha first read me the post, he did not specify that he was talking about babysitters. He just said that to hire somebody for a night would cost $X. Now, if you were talking to a 19yo man, what would you think? Certainly not kids, right? 
My feeling is that one’s income has nothing much to do with what one should pay for a babysitter. The going rate has a lot more to do with it.
There is a base rate for one child, weekend night, no special occasion. Add to that for more kids. Add to that for overnight (hours the babysitter is expected to be asleep are paid slightly less than hours the babysitter is expected to be awake). Add to that for New Year’s Eve. Add a nice tip to that if you ever want to use this babysitter again. Be sure to provide lots of good food like chips, soda, ice cream, etc. Cable or satellite is nice. Easily-managed kids are wonderful. Brats cost extra and may cause the babysitter never to babysit for you again.
phantomdiver
ex-babysitter
Now back to punha:
PD is out of her gourd, but we’re used to that by now.