I wonder on which shopping basket they base that inflation rate. I calculated @20 in 1964 and it comes up with appr. $150 today.
I remember in 1962 when we spent $20 in the supermarket my Olds 88 trunk was full of brown bags. If I spend $150 today, my Mercury trunk is not at all full. And that trunk is smaller than the Olds trunk. And gas was 26 cents/gallon.
There must be a lot of technology items in the shopping cart that they use as a base because those really got cheaper.