单选题 The Zaxon Company produces one product and labor is the only variable resource in the production process. In the short run, Zaxon faces a horizontal demand curve at $20 per unit. The average product of labor in the short run is given in the following table:

Resouce Units	Average Product of Labor
1	25
2	22.5
3	20
4	17.5

If the price of each unit of labor (worker-days) is $ 350, and only whole units can be employed, how many units of labor will Zaxon employ?

A. 1.
B. 2.
C. 3.

【正确答案】 B

【答案解析】

Average Product Total Product Marginal Product

Resource Units Marginal Revenue Product

25 2525

22.5 45 20

20 60 15

17.57010

1500=25×$20

2 400=20×$20

3300=15×$20

4 200=10×$20

The short-run demand curve for a resource is its marginal revenue produce schedule. The price of a resource unit must be less than or equal to the MRP. Since the resource price is $ 350 per unit, the company will employ 2 units in production because MRP of $ 499 ＞ resource cost of $ 350. For a price taker MR = P.