I don't know exact figures but google sez
Bent 65k
Nzogbia 65k
Given 55k
Hutton 30k
Delfouenso 10k
Bowery 8k
233k
Mvila 57k
Capoue 20k
Holtby 67
Dembele 76
Chalobah 30k
250k
233k is enough for 4 top quality players around the 50-80k mark
I don't share your optimism that we can offload Bent, Given, Hutton, N'Zogbia and Fonz. N'Zogbia if he regains match fitness then yes and Bent would be snapped up if we lowered the asking price enough.
The rest we'd be very lucky to give them away with the contracts they're on.