Here’s a snapshot of grocery prices a hundred years ago today, courtesy of the April 29, 1921, issue of the Pittsburgh Press.
While these prices look like a bargain, there’s been a lot of inflation in the last hundred years. According to this inflation calculator, each 1921 dollar is the equivalent of $14.80 in today’s money. So the can of Campbell’s Chicken Noodle Soup for a dime sounds like a bargain, but that’s the same as $1.48 today. A pound of butter is only 50 cents, but that’s the same as $7.40 today.
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FWIW, I linked your post in here onto an item generally dealing with April 29, 1921, news:
https://lexanteinternet.blogspot.com/2021/04/april-29-1921-16-raiding-villistas-not.html
That likely doesn’t add any context to your post, but it added some to mine!