what's going on?, page-28

Analysing the day-dream further, if we were to use the recent guidance figures for 2014 of 200Koz at an average price of USD1,400poz, then a relevant formula would be:

USD1,250A + USD1,600(200,000-A) = USD1,400 x 200,000, where A is the Koz to be sold at floating price (but assumed at USD1,250 in the guidance). Using standard arithmetic, the value of A is derived as 114,285oz.

This means that for every USD100 increase in the POG, BDR's revenue would increase by USD11.428M.

If the USD/AUD rate is 0.90, the impact on revenue would be AUD12.698M.