The price index is a simple sum - the sum of the prices for a list of articles and services considered to be "typically" used by a family. The real trick consists in (a) defining what products and services (and in what quantities) are "typical", and (b) finding out the actual prices.
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The formula for calculating a price index is (Current Year Cost / Base Year Cost) x 100. The result gives you the price index value, representing the percentage change in price between the current year and the base year.
Terms of trade = Price of Exports / Price of Imports The prices of exports and imports are usually calculated with respect to a specified base year. From that it is possible to calculate changes in the mix and the value of the trade flows to arrive at prices for the period in question.
(price of commodity in the given year/ price of the commodity in preceding year) * 100
AnswerThe geometric mean of Laspeyre's and Paasche's price indices is called Fisher's price index.
loss+selling price (S.P)
Each month the Consumer Price Index (CPI) and the Producers Price Index (PPI) are prepared.