delegates or votes per campaign spending

[Muttocracy]

I'm curious, if anyone has the right sort of data on spending to make a guess... Been reading and thnking about issues of media and finance behind the Iowa results. What are the $$ spent per delegate or $$ spent per entrance poll result for Iowa?

I realize it's hard to separate general campaign money spent vs. Iowa money spent, but I expect most of it was in Iowa and ads were used both place. Maybe this can't be known without next financial statements from the campaigns? If so, when do those show up?

Thanks for your thoughts.

(edited to fix several typos)