单选题 Rajiv Moulin, an economist at the Central Bank of New Delhi , was asked to calculate a consumer price index (CPI). He was provided the data below for a basket of goods for a recent one-year period:

Category	Quantity	Price in base period	Current price
Pizza	300	2.00	2.50
Milk	150	3.00	3.50
Bread	500	2.25	3.00
S0da	200	2.00	3.00

What is the CPI in the current period if the base period CPI is 100?

A. 131.
B. 106.
C. 252.

【正确答案】 A

【答案解析】To calculate the CPI for this basket in the current period, calculate the cost of the basket of goods for the base period, then calculate the cost of the basket of goods for the current period. Then divide the cost of the basket in the current period by the cost of the basket in the base period and multiply the answer by 100. This is shown below:

Base period
	Pizza	300 × 2.00 =	600
	Milk	150 × 3.00 =	450
	Bread	500 × 2.25 =	1125
	Soda	200 × 2.00 =	400
	Cost of CPI basket		2575
Current period
	Pizza	300 × 2.50 =	750
	Milk	150 × 3.50 =	525
	Bread	500 × 3.00 =	1500
	Soda	200 × 3.00 =	6O0
	Cost of CPI basket		3375

CPI (current) = 3375/2575 × 100 = 131.07.