Suppose that total expenditures for coffee reach a maximum at a price of $5 per pound. At this price, the demand for coffee is:
Suppose that total expenditures for coffee reach a maximum at a price of $5 per pound. At this price, the demand for coffee is:
A.unit elastic.
B.inelastic.
C.elastic.
D.perfectly inelastic.
正确答案:unit elastic.