( dpa )- Final prices in dollars per ton - cash and forward. Also given are the previous trading day's quotations. # cash forward Copper 7,144.50 ( 6,835.00) 7,177.50 ( 6,875.00) Lead 2,628.50 ( 2,585.00) 2,632.50 ( 2,592.50) Zinc SH 2,547.50 ( 2,475.50) 2,552.50 ( 2,479.00) Tin 16,425.00 (16,277.50) 16,525.00 (16,207.50) Aluminium 2,315.00 ( 2,285.00) 2,350.00 ( 2,320.00) Nickel 29,075.00 (28,175.00) 29,350.00 (28,050.00)