This is something I've done before but for whatever reason it's not working in this particular application. The upper chart shows the popup label but doesn't format the number as I have set it on the Number tab. The lower chart simply doesn't show any popup labels.
The critical part of this exercise isn't just showing popup labels with the expression value displayed, but rather being able to put custom text before the expressions so the popup label is actually useful for the end user.
One more point on the bottom chart, you have another pop-up which is supposed to be showing Month, but it's in a separate expression, I don't think this will work for you so you have to join that to the first pop-up, change the expression to something like this:
The other thing I do is to put a border top & bottom of the pop-up, Qlikview has a very annoying habit of automaitcally cutting off text without any real logic applied, so the purpose of putting the border is two-fold:
It makes it look a little nicer.
Text is not cut off because the border is a long one.