Measure of central location: the mode

This is a very grandiose title for a very simple idea. If you could represent a whole set of numbers by just one, what would it be?

Since it’s difficult to talk hypothetically, it will help if we have some actual numbers to play with.

Suppose I stand outside the gates of a factory and ask the first 15 people who come out what they earned for their day’s work. Here is a possible set of answers, the figures all rounded off to the nearest whole £:

What one number would you pick to represent this set?