In the case of the exploitation of slave labor, by contrast, things are exceedingly clear. Slaves, who exist as a sort of animal owned by another hum… - Itsurō Sakisaka

A newspaper article - I can't recall the exact year - listed the capitalist Kōsuke Matsushita as the person in Japan with the largest income. I don't know anything about Mr. Matsushita personally, and just happened to see this article, but here I would like to use his case to illustrate exploitation. This example, incidentally, will assume that products and labor-power are sold at their value.

Once the means of production have become capital, a certain quantity of value is augmented through the exploitation of labor. And this valorizing value is capital.

Marx refers to the value invested on the means of production as constant capital.