As for prices: For CRT non-VIP, the rate I believe is $65/hour (please correct me if I'm wrong). That includes the girl and the room. Includes standard covered bj (cbj) and sex. Anything above that, is negotiable and depends on the girl. Most of them upcharge for things like bbbj (uncovered bj), daty (eat her out), kissing, anal (most won't do it). Each MP charges a different price, but that's pretty much what's included and what costs extra.
I think most here will agree that if a girl upcharges for something, that's considered her tip. So don't tip on top of that. Anybody disagree with that?
Since you're a newbie, I'll give you a heads up about Karla. Not saying not to take her just know what to expect. A few months ago, I took her (and I'd been with her before). She upcharged for bbbj (but that's pretty standard these days). Then after the session, I paid her her fee and the upcharge for bbbj. Then she had the balls to ask for a tip on top of that (I had 2k in my pocket so I gave it to her

). And it gets better... then she asked if I could give her coins for the bus. (My thought at the moment:
Bitch, use the money that I just paid you.). She's not the innocent sweetie she used to be.