You cant do that either, you have to look at the entire body of tests performed over the last three years, they are available. There are a dozen sites on two rivers that make up those past results. This is important because it means that the content stays relatively consistent within at least a 100 mile radius. To get a reliable number, you have to look at the recent history of past tests and average them out. Then and only then can you begin to adopt an approach to a reasonable mining plan for the production of sands. So don't waste your time trying to figure out possible  revenue scenerios until you understand the average composition.