Q:

Dollar sign on danish keyboard

I'm running a macbook pro on English language, with a danish keyboard (Microsoft Ergonomic 400) - for the life of me I cannot figure out how to get the dollar sign out of it.
I'm used to press AltGr+4 to get it. Now it just gives me the £ sign.

A:

It seems the layout may have been modified. 
Try using AltGr+Shift+3.
You can also check what key combinations produce what characters by enabling the On-Screen-Keyboard :

Open System Preferences and go to “Keyboard”, and look under the “Keyboard” tab
Check the box next to “Show Keyboard & Character Viewers in menu bar”
Enable the virtual keyboard input in Mac OS X
Pull down the newly visible Keyboard menu and choose “Show Keyboard Viewer”

