Cobalt price last month - www.infomine.com/ChartsAndData/GraphEngine.ashx?z=f&gf=110572.USD.lb&dr=1m www.infomine.com/ChartsAndData/GraphEngine.ashx?z=f&gf=110538.USD.kg&dr=1y www.infomine.com/ChartsAndData/GraphEngine.ashx?z=f&gf=140262.USD.t&dr=1y