Common use of Zinc Clause in Contracts

Zinc. Pay for 85% (eighty-five percent) of the final zinc content, subject to a minimum deduction of 8 (eight) units, at the official London Metal Exchange cash settlement quotation for Special High Grade Zinc, as published in the Metal Bulletin in US$ and averaged over the quotational period. Silver Deduct 3 (three) ounces per dry metric ton of the Concentrate and pay for 70% (seventy percent) of the balance of the final silver content at the LBMA spot quotation for silver, as published in the Metal Bulletin in US$ and averaged over the quotational period. PURCHASE CONTRACT 103-11CMX-019-0-P Gold Deduct 2 (two) grams per dry metric ton of the Concentrate and pay for 70% (seventy percent) of the balance of the final Gold content at the LONDON FINAL quotation for gold, as published in the Metal Bulletin in US$ and averaged over the quotational period. Deduction Treatment Charge US$ 212 (US$ two hundred and twelve) per dry metric ton of the Concentrate delivered basis DAP Manzanillo, Mexico or parity. This treatment charge is based on an applicable zinc price of US$ 2,300 per dry metric ton and will be: • Increased by US$ 0.12 for each US$ 1.00 (US$ one) the applicable zinc price exceeds US$ 2,300 per dry metric ton; All fractions pro rata. Penalties None one, subject to maximum contents as follow: Fe < 6% SiO2 < 3% Cd < 0.4% As+Sb <0.5% QUOTATIONAL PERIOD The quotational period for all payable metals shall be the month following the Month of arrival at the warehouse (M+1). PAYMENT All payments shall be made in US$ by telegraphic transfer. Provisional Payment 90% (ninety percent) of the provisional invoice value of the Concentrate, based on the final wet weight, final moisture, provisional assays and the metal forward LME prices referred to the contractual QP at the date of invoice is issued, shall be paid 10 (ten) calendar days after the truck to delivery to the Manzanillo warehouse against the presentation of the following documents:

Zinc. Pay for 85% (eighty-five percent) of the final zinc content, subject to a minimum deduction of 8 (eight) units, at the official London Metal Exchange cash settlement quotation for Special High Grade Zinc, as published in the Metal Bulletin in US$ and averaged over the quotational period. Silver Deduct 3 (three) ounces per dry metric ton of the Concentrate and pay for 70% (seventy percent) of the balance of the final silver content at the LBMA spot quotation for silver, as published in the Metal Bulletin in US$ and averaged over the quotational period. PURCHASE CONTRACT 103-11CMX-019-0-P Gold Deduct 2 (two) grams per dry metric ton of the Concentrate and pay for 70% (seventy percent) of the balance of the final Gold content at the LONDON FINAL quotation for gold, as published in the Metal Bulletin in US$ and averaged over the quotational period. Deduction Treatment Charge US$ 212 (US$ two hundred and twelve) per dry metric ton of the Concentrate delivered basis DAP Manzanillo, Mexico or parity. This treatment charge is based on an applicable zinc price of US$ 2,300 per dry metric ton and will be: • Increased by US$ 0.12 for each US$ 1.00 (US$ one) the applicable zinc price exceeds US$ 2,300 per dry metric ton; All fractions pro rata. Penalties None one, subject to maximum contents as follow: Fe < 6% SiO2 < 3% Cd < 0.4% As+Sb <0.5% QUOTATIONAL PERIOD The quotational period for all payable metals shall be the month following the Month of arrival at the warehouse (M+1). PAYMENT All payments shall be made in US$ by telegraphic transfer. Provisional Payment 90% (ninety percent) of the provisional invoice value of the Concentrate, based on the final wet weight, final moisture, provisional assays and the metal forward LME prices referred to the contractual QP at the date of invoice is issued, shall be paid 10 (ten) calendar days after the truck to delivery to the Manzanillo warehouse against the presentation of the following documents: