hey, the 810 plan is basicly 3 or 4 packs a day, goes by your height etc .. if your 5.8 or over you need 4 packs..
prices can vary from cdc to cdc, i am on 3 packs a day and pay £35 a week..
if you go into the cambridge diet forum, at the top you will see alot of sticky threads, they are full of informaion about the diets and the packs and prices and what flavours etc..
hope ive helped
best of luck with your journey.
this is a great site for support, so please post when ever you need help/advice/support