When you include the spending by the super PAC supporting him, Mitt Romney is spending around $90,000 per delegate won so far in the Republican race.

Buzz Feed looks at the numbers and finds that Rick Santorum is spending about $30,000 per delegate and Newt Gingrich is dropping about the same as Romney. Ron Paul is spending more than $160,000 per delegate.

 But, it looks like Romney is getting his money's worth.

Measured by spending-per-delegate, the measure that matters, he's running a more efficient campaign than one of his Republican rivals, Ron Paul, and a campaign that's roughly equivalent to Newt Gingrich's. Santorum, meanwhile, is running a more efficient campaign, but not by the order of magnitude the raw numbers suggest. Romney's campaign has only spent about twice as much, per delegate, than Santorum; that figure increases to about three times as much if you include the SuperPACS — but nothing like the ten-to-one margin that emerges from the overall spending comparison.

The upshot: Romney may be spending lavishly, but at least he's not throwing away his donors' money.