A consumer price index (CPI) measures changes in the price level of market basket of consumer goods and services purchased by households.
The CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically.
price 1995 = cost 1980 x ( CPI 1995 / CPI 1980)
price 1995 = $ 2.70 x ( 152.4 / 82.4 )
price 1995 = $ 4.99 is
The average price for a movie ticket in 1995