Monday Marx: Capital Vol. 1, Chapter 9
Surplus-value (s-v): value of a product is more than the value of the sum of its parts
Value of labour-power: value of the means of subsistence required for the worker to live
The capitalist pays wages equal to the means of subsistence, but the worker produces more value than that
S-v goes to the capitalist e.g. worker is paid £90 & produces £180, rate of s-v 100%
Rate of s-v expresses degree of exploitation