The marginal product for the last worker hired was 70, and the wage paid for that worker was $35. The marginal product for the last piece of capital was 200, and the cost of the piece of capital was $50. In order to produce at least cost, the firm should

• a. hire more workers and buy less capital
• b. buy more capital and lay off workers
• c. expand the factory
• d. demand a reduction in vacation benefits for workers
• e. lay off workers and reduce the amount of capital