announcement out, page-6

A few questions guys:

What is calcined Fe?

They say their resource of 43.5mill tonnes at 57.6% Fe is DSO. As it is less than 60% Fe, from what I have read on the net, ore less than 60% is DSO if the impurities are low. Which of the impurities on Page 6 are the most relevant?

On Page 6, they say the ore body is approx 2klm*800m and average 15m thick. If I do 2000m*800m*15m*2.83sg, I get 67.9mill tonnes. yet they say 43.5mill tonnes. What am I doing wrong?

Cheers