Average Food Prices: a snapshot of how much has changed over a century

"As many senior citizens will tell you, prices have increased quite a lot over the past century. Of the items listed, potatoes were the least expensive item in 1913, at less than 2 cents per pound. By 2013, flour had replaced potatoes as the cheapest item per pound among the items tracked. And while potatoes remain among the cheapest food items today, potato prices have increased over 39-fold since 1913, the sharpest rate of increase seen of the items tracked over the past century..."
Average Food Price changes over the years