The numbers will be better than this, in my opinion. $21 million in revs in 2009 came from 17 tons of bulk additives, at most (12 ton capacity previously plus 5 tons from new facility in the last month). So the selling price would be 1.24 million per metric ton, or $1,240/kg. That's about 70% higher than this guy is estimating.
Also, I think the prices only go higher from here, since they are producing at about 1/6th of the cost of their foreign competitors.