You seem to be equating turnover with profit. On the turnover, £80k?? What about kids, concessions, freeloaders, etc
On the other side what about running costs, wages etc?
As for Sheffield, the crowds look pitiful at the moment. Even if they double for the semi or final which I doubt, I doubt there'll be more than 1500 there. If a third of them are kids youre probably looking at 15k. I reckon 1000 will be there at most. Take out rent running costs wages etc and there wont be much left.