Goal Values for Adsense

[castor_t]

I am just getting myself familiar with the concept of goals in analytics. Is it possible to set up a goal for an adsense click? I do not sell any products/services on my website and my only source of income from my website is adsense clicks. How can I set up a goal value for this?

PS: The Number of Adsense Clicks differ every day and the CPC also differs.

[castor_t]

Any suggestions will be highly appreciated. I just don't know how to set up goals for my site. I could only think of number of visits and time on page... Is there a way to set up goals related to adsense revenue?