What is my Blog worth?

I found this website that says my blog is worth over $6000. It just does not tell me over what time period. Is that per month, year, decade? I also do not have any clue how to cash in on this value.

I have been thinking about signing Sad Salvation for an ad program. I just do not know if it will be worth the money or not. If it could get me six grand in a year, I would be willing to do that. That would get me a camera.

My blog is worth $6,774.48.
How much is your blog worth?