True that, but a 118 pound meal where the average wage was almost that per year and only for professionals like engineers - would have needed a lot of people with salaries higher than that. I bet it was shillings not Pounds.
A £ today is worth about $1.40, so that's about $11, which is actually a pretty good price for a decent fish dinner I suppose, maybe even a little low. But this menu is for something like a lunch counter, so that's pretty much comparable.