Question: The following figure shows the market for lows killed labour.

The value of marginal product of high-skilled workers is $16 an hour  greater than that of lows killed workers at each quantity of labour. The  cost of acquiring human capital adds $12 an hour to the wage that must  be offered to attract high-skilled labour. Compare the equilibrium wage  rates of lows killed labour and high-skilled labour. Explain why the  difference between these wage rates equals the cost of acquiring human  capital.