Extra lean is generally free (check the fat content is typically less than 5% fat per 100g) whereas lean (or typically less than 12% fat) is 2 syns per 100g raw weight.
I thought all mince came with a certain amount of fat content according to whether it was lean or extra lean. Isn't it that that binds it? Unless you bought a mincer and minced some lean steak with the fat removed. Or spoke to an actual butcher who may be able to do that for you.
Then I need to correct me earlier post because I remembered it differently. But most supermarkets extra lean is listed on syns online as free so that's what i go by