Guys, I just realized something here.
Lets take the Morata sale. We purchased him for 20m on a 5 year contract. Based on accounting methodology, we would have booked an annual amortization charge of EU4m per year. His net salary would have been around 3-3.5m?, meaning his gross would have been ~EU6m. Morata was costing the club EU10m per annum. His book value after 2 years would therefor be 12m. So by selling to Madrid for 30m, we booked a gain on his sales of 18m. In terms of the books for this financial year, Morata goes from -10m effect on the Profit before tax to a positive effect of 18m - that is a 28m swing.
Now Zaza - Assume Wolfsburg actually pay the 30m being speculated. We bought him on a 5 year contract for 20m - same annual amortization of 4m per year. Wages would be lower - say gross is around 3-4m per year. After one year, his contract book value is 16m, meaning we would book a 14m gain on his sale. His annual cost was therefore 7-8m per year and now we get a 14m gain - that is a 22m swing.
So Zaza and Morata sales would contribute to a 50m positive swing in year 1 but after the gains are excluded the swing is 18m.
Now, Pjaca. Lets assume the fee is 22m for a 5 year contract at net wages of 2.5m per year (5m gross). His total cost per year would be 9.5m.
So if we bought a young striker with a transfer fee as high as 50m on a 5 year contract with wages of 3m net or 6m gross, that player's cost would be 16m per year. We would still be ahead on year 1 by a lot but 7-8m behind for the years after that.
In this scenario overall effect on P&L is as follows:
16/17 = +24.5m
17/18 = -7.5m
18/19 = -7.5m
Net effect over 3 years is still positive - so doesn't hurt FFP considerations.
Bottom line is, we do have reasonable fire power to upgrade the attack if Zaza was sold in addition to Pjaca.
Of course, I am only taking the forwards in isolation and not considering the expenditures / sales in other departments.