Definitely the 400 ballpark. Slightly over - maybe 420. They sell it as a 5 day festival though (even though not much happens on Weds) which makes it less than £100 per day. Although - and not just Glastonbury but festivals in general- even though there is loads on offer - you can only be in one place at a time and £1600 for a family of four starts to (depending on circumstances obviously) sound like a lot of justification needed.