Hi bootversion, your question on how to calculate assay results and the value of the results has an easy answer. I use a  metal calculation formula found on the tradingchief.com  website called "how much is your dirt worth". It only takes a minute to figure it out and is very user friendly.

Here is a link to the sites calculator. Hope this helps with your question.

 http://tradingchief.com/en/dirt.php

Al