8. In this regard, let us see the meaning of Consumer Price Index, which is subject to changes in price level of consumer goods and services provided to household. The Consumer Price Index is a statistical estimate constructed by using the prices of sample of representative items, whose prices are collected periodically and sub indices are computed for different categories and sub categories of goods and services to produce the overall index with wages reflecting the share in the total of the Consumer expenditure covered by the index. The annual percentage change in Consumer Price Index, is used as a measure of an inflation. Consumer Price Index can be used to index (that is adjusted for the effect of inflation/notification) to determine the real default wages, salary, pensions, for regulating the price and for deflecting, and therefore, the Consumer Price Index is the appropriate index that can be used to determine the income of a person based on the income mentioned in the Second Schedule, which means, the income structured formula mentioned in the Second Schedule will be changed every year based on the Consumer Price Index. Therefore, in the present case also, it would be appropriate to apply the Consumer Price Index for the relevant year by taking the annual income mentioned as per the structured formula in the Second Schedule. Be that as it may, the Central Board of Direct Taxes (CBDT) has been issuing notification from time to time, every year, in which, the Cost Inflation Index is indicated for determining the capital gain index.