The lowest cost copper producers are:
1) Southern Copper Corp (NYSE: SCCO) $1.00
2) First Quantum Minerals Limited (TSE:FM) $1.30
3) Imperial Metals Corporation (TSE:III) $1.31
4) Freeport-McMoRan Inc (NYSE: FCX) $1.49
5) China Gold Intl Res Corp Ltd (TSE:CGG) $1.65