I dont know what Rosy C was like 2 years ago so dont know if its changed - Sorry.
I started at the classes and was told to stick to 1200 Kcal for the first two weeks, all food has to be less than 5% fat. next two weeks was 1400 kcal and 100 kcal could be 'high fat'! after that i was given my own personal allowance- which you should be able to get from the book.