Hi Kropka, The difference between the two scenarios is quite...

Hi Kropka, The difference between the two scenarios is quite substantial.

Should we not just be able to read the report and know what it is, concentrate at 30% or contained Tantulum, shouldn't need to be an expert to be able to understand the report.

If you are saying it's a 30% concentrate based on this from your post, " as well high-grade concentrate grading in excess of 30%", then I think @luanboo would need to re-do his calculation as I believe he has calculated it based on it being contained Tantulum in his word press document, either that or he has applied that formulae from his expert which I believe to be wrong, which seems to be confirmed by UY's post.

From Luanboo post,
"Given that, we further assume that another 20t of high grade Tantalum is shipped in Mar 2019, that makes a total estimated 60t (ie 132,240 lbs) of Tantalum shipped. With an average price assumption of USD70/lb, I am estimating the Ta credits to be approx A$12.96m"

https://hotcopper.com.au/threads/a40-price-action.4579975/page-314?post_id=37739748#top

Though it's only a $9m difference to the $12.96m figure quoted, perhaps not worth worry about.

All the best.