Point of production v point of extraction in exploitation process

The two points neednt ever coincide at all The capitalist production system tends To equalize product level profits Thru market forces dynamic impact on firm level product Mark up realizations This is by no means a simple reflection Of the exploitation of the direct labor inputed into that product at that stage by that firm alone ..... Market mediated competion for jobs may optimally equalize wages for Certain tasks across firms But this only equalizes that tasks rate of exploitation without determining the exact rate of that exploitation or it's points of extraction in the whole system of production and circulation