A firm achieves least-cost in production by substituting factors until?
their prices are equal
the ratio of their marginal -physical-products equals the ratio of their prices
their marginal -physical-products are each equal to their factor prices
their marginal -physical-products are each equal to zero
The correct answer is: B
Explanation
No official explanation is available for this question at this time. Please check contributions posted by others below. If you can provide an explanation to help other student learn.