We may find that costs of production surprise to the downside. From the development strategy for Konongo release in May 2009...
http://www.signaturemetals.com.au/pdfs/DevelopmentStrategyKonongoGoldProject07Jul09.pdf
"Open-cut mining of these deposits was carried out at a gold price of USD300/oz with ore trucked to the existing Konongo CIL plant"
bluebush