In contradictions in the General Formula of Capital Marx argues that surplus-value does not originate from the sphere of exchange of commodities through money, but it arises from labor process. And from the workers that exchange their labor power in return for a means of subsistence. He gives an example of two owners of commodities. They both part with goods that, as use-values are of no service to them and receive others that they can make use of. "This act produces no increase of exchange-value either for the one or the other; for each of them already possessed, before the exchange, a value equal to that which he acquired by means of that operation". Exchanging a commodity for another does not give the owners of the commodity extra value for their commodity. And the result is not altered by introducing money, as a medium of circulation between the commodities.
My question is this:
Do you agree with Marx claim? Do you believe that exchange does not increase surplus value? Explain