I doubt the reliability of fiorentina.it in this case. Many numbers don't match.
The numbers about Juve's yearly wages are more or less correct. Last year we were paying 96.9m eur, but this year we've added few more high earners (Sissoko, Poulsen, Amauri, Mellberg) and it's possible that we're paying 115m eur per year on wages. (although , i don't think we're paying so much since we also got rid of around 9m eur by selling Boumsong, Almiron, Palladino, Nocerino, Criscito, Birindelli and Olivera, and with Del Piero accepting a pay cut).
But Milan's and Inter's salaries don't match, especially Milan's. Milan were paying 120m eur last year.
Since then they got rid of Ronaldo (5m eur a year), Cafu (2m), Serginho (2m), Gourcuff (1m), Digao (1m), Gilardino (3.5m), Simic (1.8m), Oddo (2m), Brocchi (1.5m).
So, in total they got rid of ~20m eur net (around 40m with taxes included), but they brought in Ronaldinho (7m), Flamini (5.2m), Zambrotta (3m), Borriello (2m), Abbiatti (1.5M), Antonini (1.5m), Shevchenko (????, but probably at least 3m), Senderos (?????, probably 2m). Plus they gave a pay rise to Kaka, which means they are paying around 5-6m eur net more than last year (10-12m eur with taxes included).