Today's Final prices in dollars per ton - cash and forward. Also given are the previous trading day's quotations, dpa reported. # cash forward Copper 4,455.00 (4,539.50**) 4,455.00 (4,527.50**) Lead 1,472.50 (1,484.50**) 1,466.50 (1,477.50**) Zinc 1,421.50 (1,435.00**) 1,447.50 (1,461.00**) Tin 12,795.00 (12,475.00**) 12,475.00 (12,200.00**) Aluminium 1,300.00 (1,310.00*) 1,325.00 (1,335.00*) Nickel 11,365.00 (11,447.50**) 11,425.00 (11,512.50**) * value on Tuesday April 21 ** value on Wednesday April 22 #