OREANDA-NEWS. The official purchase prices at cash calculations on the London Metal Exchange on April 20, 2007 made $2 829 for a ton of aluminium, $8 039 for a ton of copper, $1 978 for a ton of lead, $50 595 for a ton of nickel, $13 940 for a ton of tin, $3 689 for a ton of zinc.

Three-month purchase contracts were made at the price of $2 856 for a ton of aluminium, $7 995 for a ton of copper, $1 975,5 for a ton of lead, $48 845 for a ton of nickel, $13 895 for a ton of tin, $3 700 for a ton of zinc.