经济学题英文的.

题目

经济学题英文的.
Q2 The following depicts the prices and total costs a local used-book store faces.The bookstore competes with a number of similar stores,but it capitalizes on its location and the word-of-mouth reputation of the coffee it serves to its customers.Calculate the store’s:
(a)total revenue,
(b)total profit,
(c)marginal revenue,and
(d)marginal cost at each level of output.Based on the marginal analysis,find the appropriate profit-maximizing level of output for this business.
Output Price per book Total costs
0 6.00 2.00
1 5.75 5.25
2 5.50 7.50
3 5.25 9.60
4 5.00 12.10
5 4.75 15.80
6 4.50 20.00
7 4.00 24.75

答案

这个题貌似不全 没数字额 .
如果就是这些的话 总收入肯定是买书的钱,总利润就是买书的钱减去书的成本和提供咖啡的成本,边际收入就是每多卖一本书时多收入的钱,边际成本就是买一本书所花费的书的成本吧.(加上可能提供的咖啡成本?..)