Turville, thanks for your help. All I've done is quoted revenue as calculated by using LME prices and the actual metal amounts (not the concentrate) and I know things like the smelter costs, etc are yet to be removed.
The share price looks to be spring-loaded and ready for severe action with market depth dwindling on the sell side. And why wouldn't it be. This is the cheapest base metals producer (actually cashflow positive) on the market.