: All commodities (averaging out socially necessary labor-time) are exchanged (sold) for their TRUE value.
usually true, but not always. I worked in fast food once. Every morning we'd walk literally around the block (maybe a minute away) to a bagel chain, Finagle's. We'd buy bagels there for fifty cents each, take them to our greasy coffeehouse around the block, and sll them for a dollar. Did we put labor into the bagels? If commoditeoies are always sold for their value, then how could the bagel be worth fifty cents before and a dollar afterwards? Did we suddenly double the amount of labor put into that bagel? Hardly!
If you ask me, the baegls were always worth fifyty cents, and like most fast food entreprises, we were diddling the customers.