Thanks Greg, I think they made a big mistake. When you take 4215 ounces instead of 3215 ounces you get nearly exact these $6,797,853 (at an avarage goldprice of $1612,8/ounce). Can't believe such a mistake.

Now my calculation of produced and sold ounces is correct again:

 

according News Release from 24.2.2012 and Q3/2012: 
Gold production 31.12.2010 1111 ounces
Gold production 31.03.2011 1021 ounces
Gold production 30.06.2011 1947 ounces
Gold production 30.09.2011 4592 ounces
Gold production 31.12.2011 4496 ounces
Gold production 31.03.2012 4808 ounces
Gold production 30.06.2012 4891 ounces
     
Gold sale 31.12.2010 1211 ounces
Gold sale 31.03.2011 921 ounces
Gold sale 30.06.2011 1893 ounces
Gold sale 30.09.2011 3383 ounces
Gold sale 31.12.2011 3861 ounces
Gold sale 31.03.2012 3327 ounces
Gold sale 30.06.2012 4215 ounces
 
stockpile: 4055 ounces