Reall Westcott ...... And pray tell me about the now...

Reall Westcott ...... And pray tell me about the now mysteriously missing fourth cost quartile? All rather than admit you were wrong mind you.

Also I note I said "relatively expensive" not "expensive" - which doesn't justify you muddling basic maths, or now your desperate back-peddle to try to explain yourself.

From the African Down Under Presentation,page 13 that I have often referred you to, here is the itabirite as 3rd cost quartile:

And as for your attempt to re-calibrate a range, as a point estimate, then to jump over that point: