I let one of the girls at the Cambodian Immigration office take care of everything, I know when I did it five years ago I only paid 300 baht over the visa fee for an in an out, so yes 2700 baht was a lot more, could I have just gotten a visa and tried to go across and come back on the same day, maybe I don't know for sure, wasn't going to argue with them, just wanted to get it done with no hassle, only doing it to get my OA cancelled, next day I went to Immigration and applied for an O Visa, was supposed to get approval today, October 3rd, called them to make sure it was ready and they said call back in the afternoon which I will do shortly