I think it may be a little more complex than that. I understand we got 2 million for Robinson, and will have (at least) a 10% sell on fee, so there's another million. 3 million pounds in total. Probably Baines's wages for a season. Alternatively probably the cost of keeping the academy running for an entire season.
We have to factor in, to keep Robinson here, would probably cost 20k maybe 30k per week. So that cost has to be factored in too.
Most importantly though, is that Robinson was not at the level of Ac Milan, or any other side in the summer who would be willing to pay £10million. He probably required 15-20 games to really kick on. These are not games we could afford to give him.
Wigan will benefit to the tune of 6 million after they pay us, and we will receive 3 million. It's not great, but it's also reasonably fair given they have played s key role in his development in terms of game time he's been given.