The numbers that are coming out include the proposed salary as well, it shouldn't surprise anyone that they're very high. It would be a pricey operation, period; I couldn't possibly see it being less than 65M euros all in, and likely closer to 80M.
70M pounds is a touch hyperbolic, but a 20M euro transfer fee, plus an annual contract of 7M euros net (after the 43% income tax rate - which means the club is paying out around 12.25M euros for the player per season) would mean that the total cost of the operation would be in excess of 80M euros on a 5 year deal.
So this "news" isn't exactly a shocker, is it?