If we sell two or three home grown players for 100 mn we can buy five players worth 100 mn annual cost and still within ffp. So for example if we sell mount,Ruben,chalobah and maatsen for 100 mn we can sign ugarte for 60 mn,caicedo for 80 mn, mashmardville for 30 mn and nkunku for 60 mn without any problem at all according to ffp.
I don't add possible sale of ziyech,pulisic,kovasic,kepa, havertz and Mendy. If they all departed we can still able to sign 100 mn striker if we wanted and still within ffp.