I *think* easyJets net increase in fleet size for next year is 7. Assuming a ratio of 5 crews per aircraft this means 35 new Commands for current FO's and therefore 35 new jobs for FO's to join. Allowing for a few leavers/medical losers then an annual demand of around 40 cadets might be about right.
Would that not make 70 new FO places?
You would need 35 to replace the upgrades, plus 35 for the new aircraft?