**Python 2.7 56**

With the stolen [Number One Dime](http://disney.wikia.com/wiki/Number_One_Dime) from [Scrooge McDuck][1], I made my fortune and now have more wealth than Scrooge.

    y=lambda s:abs(sum([[1j,-1,1,-1j][ord(i)%5]for i in s]))


  [1]: http://en.wikipedia.org/wiki/Scrooge_McDuck