问题
单项选择题
Suppose the CPI basket contains only two kinds of goods (services): gasoline and taxicab service. In the base period, consumers bought 15 gallons of gasoline at $6 and 4 miles of taxicab at $3 each. In the current period, consumers buy 15 gallons of gasoline at $6.2 and 4 miles of taxicab at $2.5 each. The CPI for the current period is closest to:（）
A. 99.0.
B. 101.2.
C. 115.3.
答案
参考答案：A
解析：
消费者价格指数(CPI)是选定的一篮子消费品的现价的加权平均数同这一篮子消费品的基年价格的加权平均数之比，其计算公式为：
[考点] 消费者价格指数(CPI)与通货膨胀率
