Copper concentrate 28-30 ex Peru

We have copper concentrate from Chile and Peru.
28%Cu Country of Origin: Peru
PACKING: Big bags in container up to 400 tons per month, henceforth bulk shipping.
REJECTION : Concentrate with less than 20.0% Cu is rejected by the Seller unless a special agreement between Seller and Buyer is done.
PRICE CIF Chile: LME, X % CU, X FACTOR DISCOUNT% (Payment LC after shipment with B / L presentation)

30% Cu Country of Origin: Chile
PACKING: Big bags in container up to 1,000 tons per month, henceforth bulk shipping
REJECTION : Concentrate with less than 28.0% Cu is rejected by the Seller unless a special agreement between Seller and Buyer is done.
RICE CIF Chile: LME, X % CU, X FACTOR DISCOUNT% (Payment of the SBLC / LC after shipment with B / L presentation)