Off the top of my head I'm not sure, but there's a sticky about which foods are ketogenic and I have a feeling that the Exante leaflet which comes with the food packs tells you how many calories for working solution and simple solution.
They toldme yest that if I want tto stay in ketosis that i should eat 400 cals and that can include meat and green veg. so as long as you dont exeed the cals it should be fine