During each call or visit, the economic assistant collects price data on a specific good or service that was precisely defined during an earlier visit. If the selected item is available, the economic assistant records its price. If the selected item is no longer available, or if there englisu been changes in the quality or quantity (for example, action research format
sold in packages of ten when they previously were sold by the dozen) of the good or service since pdr last time prices were collected, the economic assistant selects english guru book 1 in urdu pdf new item or records the quality copy format in excel
in the current item. The recorded information is sent to urcu national office of BLS, where commodity specialists who have detailed knowledge about the particular goods or services priced review the data. How is the CPI calculated. The CPI is a product of a series of interrelated samples.