My first >$20 burger dinner was in 1997. That's >$41.15 now.
EDIT: Ahh, here - price for a hamburger in the staffed dining car of a passenger train from Houston to Chicago, 1972, was $2, from https://archive.org/details/spacecity03spac_44/mode/2up?q=%2... while $3 gets you "grey sole with soup, salad, rolls, vegetables, and dessert." The author suggests the hamburger price is high, as an inducement "to observe formalities."
alt Hacker News
You'll need to give more details.
Diners like the one portrayed in The Olympia Restaurant sketches on SNL were cheap. https://www.youtube.com/watch?v=puJePACBoIo
Others now are far more than $18.
My first >$20 burger dinner was in 1997. That's >$41.15 now.
EDIT: Ahh, here - price for a hamburger in the staffed dining car of a passenger train from Houston to Chicago, 1972, was $2, from https://archive.org/details/spacecity03spac_44/mode/2up?q=%2... while $3 gets you "grey sole with soup, salad, rolls, vegetables, and dessert." The author suggests the hamburger price is high, as an inducement "to observe formalities."
$2 then is $15.80 now. Fries not included.
At https://archive.org/details/neworleansunderg0000coll/mode/2u... we read that an excellent hamburger at Ruby Red's in New Orleans cost $1.25 in 1970, which is $10.64 now. While at Bud's Broiler hamburgers run from $0.40 to $0.60. https://archive.org/details/neworleansunderg0000coll/page/22...
So I find it hard to believe most people back in 1970 were paying the equivalent of $17 for a burger and fries.