It is quite interesting to look at these relationships between prices over the years. It is surprising just how many things have retained their relative value.

When I was running folk clubs back in the 70s, a good rule of thumb for entry prices was the equivalent of 2 pints of beer (now approx £5) and occasionally for a concert night 3 pints (£7.50).
In the 60s when I got my first car, a gallon of petrol was 4/11d (now 25p) which equated to 2 pints of beer (then about 2/6d). A good tailored suit was about the equivalent of a week's wages - probably still is, although I haven't bought one for years. There weren't supermarket suits in those days (although a John Collier off the peg was just under a tenner).
If you measure everything in pints of beer though, and forget the amounts of money, it is surprising how many things have stayed in kilter. Try it with your mates down the pub!!

G