Calm down for petes sake!!! Darren, has stated he has only done domestic beforehand, commercial work is different, you all know that...and if you have to start somewhere then a 70m2 commercial kitchen is a good start. Darren, I am hoping they will hand you a set of drawings for the floor, and on these will be section drawings of the build up, they want along with a specification. Please remember though, you have probably got to go like the clappers, as they never want the kitchen out of action for longer than necessary. Also you cannot ever afford to make any mistakes, there is no messing around, you have to hit it hard, and do it right. You may want to team up with a commercial tiler, to show you how this type of work is done.
Good luck
Pebbs