World Metal Price (US$) Date Sliver/Oz Zinc/Ton Aluminum/Tom Copper/Ton Platinum/Oz 30- April 31.29 2066.62 2091.26 8695.68 1570.00 2- May 30.80 2071.33 2095.52 8648.86 1562.00 3- May 30.42 2040.64 2077.38 8535.97 1556.00 4- May 30.01 2029.44 2073.12 8484.45 1535.00
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