so cesc and costa to chelsea how much more can they spend to meet ffp?
Why do they need to meet FFP? They're evidently not fussed about spending money, and the reduction in size of the CL squad to 21 isn't exactly an issue - most teams won't use more than 21 in the CL anyway - so the incentive to match FFP is far smaller than the incentive to buy a squad capable of winning the PL and CL.
Chelsea will continue to meet FFP. They have constantly been reducing their wage bill (it is roughly the same as Arsenal's now and much less than Man U's and City's) and have been selling players to cover their acquisitions.
Luiz was just sold for £40mil+, Costa and Cesc would be about £60mil combined so the difference is very manageable, especially with increased prem revenues.