Consider the one-year inflation rate for each of the three years from December 1979 to December 1982. Find the sum of these three numbers. (Round your answer to one decimal place.)

In this exercise we see the cumulative effects of inflation. Refer to the CPI table. Consider the one-year inflation rate for each of the three years from December 1979 to December 1982. Find the sum of these three numbers. (Round your answer to one decimal place.) % 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 39.8 41.1 42.5 46.2 51.9 55.5 58.2 62.1 67.7 76.7 86.3 5.6% 3.3% 3.4% 8.7% 12.3% 6.9% 4.9% 6.7% 9.0% 13.3% 12.5%