I think is what wall street calls "Return on Investment":
Total spent campaign 2012: $104,710,472
1.29% of $103,559,717 spent in the general election and ending in the desired result.
Supported 0 winning candidates; 0.00% of money went to supporting winning candidates.
Opposed 2 losing candidates; 1.29% of money went to opposing losing candidates.
From this story on another loser... erm job creator... erm layoffer: