Zinc, page-7

Nic , see 2012 Annual Report for more detail , but this was the guts of their scoping study :

Several open pit scenarios were postulated for mining at Border, ranging from 500,000 tonnes per
annum (tpa) to 2 million tpa. For a 1 million tpa mine, key findings from the Border scoping study are as
follows:
• The value of the potential ore is around $US45/t1,
• The average direct mining costs are estimated at around $US10/t potential ore2,
• Mineral processing costs (i.e. DMS followed by grinding and flotation) are estimated at
around $US6/t potential ore,
• Metal royalties amount to 3%.