Alexis Sanchez has one of the big salaries in the Premier League and he has not shown his quality on the field of play. The Chilean left Arsenal and chose United over City in a move which maybe both parties regret.
Months later, United are looking for a team for him and he is currently negotiating with Inter Milan, who would get the striker for a cheap price considering how the market is. Unlike the massive amount of money the 'Red Devils' paid for him at that moment in time.
With a loan spell and purchase option which would be under 20 million euros, United could pay Alexis Sanchez the money left on his contract so that he leaves.
According to the 'Daily Mail', there is a clause in the striker's contract which would force the team from Mancester to pay him the two years left on his contract, that is to say, pay out around 39 million euros.
If so, United would have to pay slightly more than 20 million euros for the departure of Alexis Sanchez net instead of filling the coffers with money for someone who was a world class player.