What is the average Jenny Craig diet comprised of? How many calories a day?

I am going on the Jenny Craig diet but I can't afford it until next month. Until then, I was wondering how I can start like a pre-jenny craig diet similar to what I'll be starting once I'm on the actual program. I know it's customized, but is there anyone who can tell me some examples of easy staple snacks and meals I can be eating until I can officially start? What not to eat/how many calories max I should eat a day/how many meals and how many calories approximately per meal I should eat? Thanks!