I've got through to interviews at an Apple Store in the UK. I'm still at school so I can't do too many hours but I don't want this to put them off. How many hours do you think I can reasonably offer, 10 would probably be getting on for maximum for me. 
Also, I don't want to start work until september, will they accept this?
Also, I don't want to start work until september, will they accept this?