Cancelo will be the first one sold.
We will find it hard to get rid of the likes of Khedira, Mandzukic, Higuain as they are all in their 30s on high salaries and Pjaca who is permanently injured will probably be loaned out for years on end. Perin will probably be an easy sale to Benfica.
Icardi will be the next (and last) purchase imo if we managed to get rid of Mandzukic and Higuain.