Asda billboard hides something important

This a picture of a billboard I drive past on the way to work (click picture to enlarge).

Most advertisers appreciate that this type of media should be used to give the passing viewer a quick and memorable snapshot of the product or service in question. In Asda's case - 'Blimey that's cheap, I'll go and buy some'.

But in order to place a value on something you first have to know the quantity the advertised price relates to.

So to the naked (moving) eye, how many bags of crisps or cans of Coke do you get for £4?  The coffee is just about self explanatory but the size of the jar is still open to interpretation unless you have binoculars.

The quantities are actually there, you just can't see them.

And that surely, is the point.