I'm building a niche SEO site targeting a local keyword with an Adwords CPC of $33.79. There are 18 advertisers for this keyword. Is there a way to figure out what the Adsense CPC would be for a keyword like this? Like a formula or something or just some insights? It would be nice to be able to roughly calculate this number before spending time on an Adsense site that ends up making no cash because the CPC was really nothing close to the Adwords CPC. Thanks in advance.