I think it's €15.5m total, but I've said many times that this is a pretty generic price for a player of this age and ability, if you are buying from an established Serie A club with no financial problems. If Udinese were in trouble he'd go for €10m, less if they were relegated, but then why would we be looking to sign him in that case. Allan will cost the same, anyone who does well there will. Palermo will be the same, Sampdoria, Fiorentina, Genoa, whoever.
Signing players under those circumstances costs a set fee, for someone like De Bruyne there was never going to be any ransom because he obviously wanted to play somewhere, but what Chelsea do is buy players of the right age. That they can spend €30m a time on players and not worry so much about a loss is where we differ. But at least we are looking at players in that age range now.
It's no bargain, just the retail value. Only if he excels or flops can you look back in hindsight and talk about that, like any player.