It could potentially be around 90 million, in years to come.
It will be 75 million up front. 10million in add on # 1, dependant of utd winning either the prem or CL. Add on # 2 will be another 5 million if he places in the top 3 of ballon d'or. Totaling 90 million
We may never see that extra 15.
Source?