For a look at 1978 grocery prices, this ad appeared in the Pittsburgh Post Gazette on April 5, 1978. The prices might look low, there has been a lot of inflation since 1978. According to this online calculator, one dollar in 1978 works out to $4.89 in 2025 dollars.
This means that the ten-pound bag of potatoes for 98 cents is about $4.79 in today’s money. And the quart of Miracle Whip for 59 cents would be about $2.89. A pound of bacon for $1.29 would be $6.30. If you want to compare prices, these links take you to the current listing on Amazon for the same product.
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