My mom paid about $14 for a week of groceries for three people in 1968.
My mother always said that we’d have a revolution in this country if a loaf of bread ever cost a dollar.
Not a fair comparison. Most of those groceries were sourced locally in the USA. And portions were larger in larger containers, with fewer vendors, that kept prices lower. These days, portions are much smaller, in smaller containers (at much higher prices), and contain many artificial ingredients, many of which come from other countries and the cost of shipping is factored into the price.
Fact of the matter is that your mom paid almost nothing for groceries back then compared to the sky-high prices now.