13. If the firm were able to perfectly "wage discriminate" it would pay each worker a different wage and exactly the minimum wage needed to induce that worker to take the job. In this case the Marginal cost of hiring one more worker, the MFC is the same as the labor supply curve, L_S. The firm would hire workers as long as the cost of hiring an added worker is below the additional revenue generated by that worker (MRP or Demand), in other words, as long as the MFC < D_L. The firm's total labor cost would be the shaded area to the right. Only the last worked hired would receive a wage of W₂.