Google is a wonderful friend:
- Initial rate of flying pay = £12.95 per day.
- Food charges - £26.31 per week (don't know how PAYD works with this).
- Single accomodation for JO = £1668 per annum.
I'll let you do the maths!
Don't forget your Mess Bill as well - Mess subs, Ents levy, silver levy, gardens levy etc etc. May be wrong but say roughly £30 per month before you add on any sqn fund subs, bar bill, breakages etc!