Copper concentrate price : "LME" copper cash seller and settlement price x Cu % x Coefficient of valuation factor % "LME" means London Metal Exchange ( ) Payment terms: LC. Inspection: SGS, Alex Stewart, Alfred H Knight or equivalent inspection at warehouse. Sales procedure: 1. Buyer sends LOI (Letter of Intent) and POF (Proof of Funds) 2. Seller sends FCO, the buyer .