I am a bid confused on the following data Silvercrest gives on its website:

1)Santa Elena Open Pit Reserves (Excludes potential metal inventory for each pad re-treatment during Expansion):.


Tons: 3,459,200
Contained AG ounces: 9,713,600
2) Results 2012:
Tons mined: 1.092.305
AG ounces produced: 579.609
My Question:
With the 2012 results in mind, how will you get 9.250.000 AG ounces out of 2.450.000 tons. It looks like the total for the tons mined will be closer to 2.500.00 ounces. However Silvercrests fact sheet lists the data above. I would be grateful if someone can clear this up for me thanks.