Alan earned $4 comma 000 at the age of 30 in 1955. Alan's son, Bill, earned $29 comma 000 at the age of 30 in 1985. Bill's daughter, Kara, earned $60 comma 000 at the age of 30 in 2015. The CPI was 9.8 in 1955, 49.3 in 1985, and 108.7 in 2015.
earned the largest salary at the age of 30.