The consumer price index (CPI) reflects the average change over time in the retail prices of a specified set of final commodities and services representing the market basket of a given group of consumers. Retail prices are the prices that the customers buying goods at retail outlets pay. Two independent sets of commodities (goods & services) are used to compute CPIs for rural and urban areas. A rural basket covers 318 items - 133 food items and 185 non-food items while the urban basket consists of 422 items- 151 food items and 271 non-food items. The national CPI is calculated by combining the urban and rural indices using weight factors. The CPI items for the national and sub-national indices have been classified into 8 major groups, such as (i) food, beverage, and tobacco (ii) clothing and footwear (iii) gross rent, fuel and lighting (iv) furniture, furnishing, household equipment and operation (v) medical care and health expenses (vi) transport and communications (vii) recreation, entertainment, education and cultural services and (viii) miscellaneous goods and services. The Release includes CPI for three groups of population: (1) national, (2) urban and (3) rural. National, urban, and rural CPIs have been constructed with 2005-06 as the base year. The base year weights have been derived from the Household Income and Expenditure Survey (HIES), 2005-06. BBS collects price data from 140 (64 from urban, 64 from rural and 12 from Dhaka City Corporation) main markets across the country.