For example, in 2003, a jar of Hellman’s mayonnaise was $1.99 and was sold in a 32-ounce container. In 2013, the mayonnaise was sold in a 30-ounce container for $4.59 (15.3 cents an ounce). Over 10 years, the per-unit price increase was 146.7 percent compared to the CPI “food at home” figure of 30.3 percent.
