The American Pound

An American professor teaches my Philosophy of Economics course. An incident from Monday's class:

Professor:	On the y-axis we have pound benefit to farmers. [tries to draw a pound symbol, fails, tries again, draws an even worse one]
Class:	[laughter]
Professor:	I... I don't know how to draw a pound.
Class:	[more laughter]
Professor:	I'll practise, I'll practise.

Below is a photo of his effort.