Commodity Labor

Labor power especially is a use-value expressed in wages.  This implies that the owners of labor do not control the means of production

Labor becomes a use-value, a commodity when it is sold to the owners of the means of production.

The point of buying labor is to put it to work to produce commodities which can then be sold.  Capital is thus a sum of money that is increased by buying a commodity and then selling it (or its products) again.

concrete