$5 shake would cost $10 today....

$9.75 according to this site.

https://www.in2013dollars.com/us/inflation/1994?amount=5#:~:text=%245%20in%201994%20is%20equivalent%20in%20purchasing%20power,producing%20a%20cumulative%20price%20increase%20of%2076.51%25%20.

So that was pretty expensive. I checked and a double concrete at Shake shake is $6.75, a large shake at McDonalds is $3.

This was a real restaurant and theme restaurants always cost a bit more.

It did look good.