Slight problem mate. Q1 ore quality was due to the mining of the U/G mine. Now that all the mine ores are from the Jupiter O/P, Q3 and Q4 should use the Q2 quality.
Somehow the math does not jell. If the mill can grind through Q1 and Q2 of 1.89mil tons, then one can expect Q3 and Q4 should be able to grind through in the region of 1.89mil tons or slightly less.
From memory, the plant can process roughly >0.7mil tons per quarter.
I am not pulling the trigger: just gently highlight a bit or slight problem!
![wink.png](https://hotcopper.com.au/images/smilies/wink.png)