Big question about h1 2016 report! COGS (94%!)

Who can answer this question, which is really the most important I think!

If you look into the operating cash flow there should be the aisc costs of max. <1.70/lb (=78.7% fr. avg. 2.16/lb sales).
So if you calculate aisc costs (max. cash costs w/o interests bec. those are under financing costs) of 1.70/lb and you take the average sales price of 2.16/lb for 1st half 2016 you should get a net cash like this:

Cashflowcalculation as forecasted with aisc of max. <1.70/lb (max cash costs!) and avg. sales of 2.16/lb:
Six months ytd. 6/30/2016:
Sales as reported:   48,871 100% (average is 2.16/lb)
Oper. cashout:    (38,461)   78.7% o. sales  (if average is <1.70 aisc = 78.7% of 2.16/lb sales!)
Oper. net cash:    10,410 21.3% o. sales (how it should be! So over 10mio$ out of operations!)

Consolidated Statement of Cashflows as reported:
Six months ytd. 6/30/2016:   
Sales: 48,871 100%   
Oper. cashout:   (46,248) 94.6% o. sales! (where are the notes for these immense costs!??)
Operating cash:   1,877    5.4% o. sales

So the difference between the calculated aisc costs (calc. above) and the real costs (reported) out of operation give us a huge gap from about 8.5Mio $!!! For what they used this cash cost of 8.5Mio$ which is nowhere explained in the report!?? Or is it just the aisc of max. 1.70 which is fully wrong calculated??? Were there any rebates which are included in this operating (aisc) costs!? You can read the same difference out of the P&L "Sales" minus "Cogs" (Gross Profit). And this gap aren't interests costs (because reported under financing cash costs!).

Who can give me a evident answer??