Since the end of march they have mined 483 tons and processed...

Since the end of march they have mined 483 tons and processed 426 tons

Thats only around 7.5 tons a day average from my rough calculations, I thought they were aiming for about 10 times that either there is a Typo with a O or I got confused.
I am no miner but would have thought one man would be able to mine about that in a day. What am I missing? I know its a difficult mine due to the angle of the lodes but there has to be some other factors reducing production rate or its a typo.
Wish Max and Nick the best and hope it works out and its just another glitch.