Using the information in the table above, calculate the number of people in the labor force

A computer manufacturer sells 1,000 units per month at $500 each. A price cut to $400 is being considered. His marginal cost is constant at $300 per unit. To maintain profits, quantity sold must increase to at least

a. 1,500. b. 2,000. c. 2,500. d. 3,000.

Use the table below to answer the following question.UnitsMaximum Willingness to PayMarket PriceMinimum Acceptable Price1$14$10$62121083101010481012561014641016At what level of output is productive efficiency achieved?

A. 3 B. 4 C. 5 D. 6