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of goods or service to serve for daily life. Consumer price is shown by

the retail price of goods in market or the price of services for people’s
livings (including VAT). In case that the prices of goods and services
are not marked and consumers can bargain, the consumer price is the

final price of goods paid by consumers in market after negotiation
with sellers.

Formula for computing average consumer price is as follows:

 M , K  / 1 ( N )
P    P ( k , j , i )
i
 j  k , 1  1   

Where:

P : Average price in the reference month of item i;
i
Pi,j,k: Surveyed price of item i at place j, period k;

K: Number of survey periods of item i in the reference month,
K = 1÷3;

k: The survey period of item i, k = 1÷K;

M: Number of survey places of item i in the reference month;

j: Survey place of item i in period k in reference month, j = 1÷M;

N: Number of samples of item i’s price collected in the reference
month, N = M × K.

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