How many Grams/Ounces do Dwarf lop rabbits need per day? Rabbit breeders please or anyone who knows a lot!

HI, i breed Dwarf lop rabbits and want to join the BRC and i read loads of books and web pages, and i some books i have read that rabbits only need for Dwarfs 20 gms a day of mix/pellets, which i am trying(by the way they get PLENTY of hay and veg!) and they are a good weight still, but wanted to know what you thought? Rabbit breeders or people who know A LOT about bunnies i want to reply, but anyone is fine to reply! Thanz and PLEASE reply!!!!!!!!!!
By the way in the UK we don’t have Cups!!!! So i don’t know what cup measurements are! Sorry!