Lets begin

[Allison]

Carl Marx believed that the wealth of a Capitalist society prevails
with "an immense accumulation of commodities". An iron, paper, pencil,
anything material can be looked at with two points of view, quality
and quantity. These commodities, for example, have a lot of use to
them, but aside from the use, they also have value. The values of
different products or materials become a reality by use or
consumption...the more it is used or consumed, the higher the value or
demand. He talks about exchange value. What can be exchanged for
something else, like a quarter of wheat for silk. We always deal with
definate quantities and they must be replaced by each other or equal
to each other, such as the wheat for silk.