the beauty of Oddleys burger reciepe is that there is no specific amount of meat called for just add to every 100gms meat 3gms bread crumb 10gms onion and 1.54gms of spice mix To make the spice mix just use gms where it says parts and you end up with 39 gms of spice mix which is added at the rate of 1.54gms per 100 gms of meat.
Hope this is as clear to you as it sounds to me If not ask again and Ill try to clarify.
Jim