Hello Rafi,
As per my understanding your client wants value of some cost element (expenses) to be flown to required profit center.
we need to understand the client requirement in details before suggesting the solution
Profit center(PC) posting is a statistical posting, PC will be derived based on the cost objects (this is for all primary cost elements), Material (primary in case of consumption and GL in case of stock).
We can give default PC for GLs (particularly for Balance sheet GL's)
In EC-PCA - 3KEH for default profit center
In new GL - FAGL3KEH for default profit center
Regards
Natarajan.V.S