Alumina cheers $33 million profit MINING companies have been cheering the fall of the dollar, none more so than Melbourne-based Alumina, which has disclosed a $US30 million ($33m) annual profit before tax price sensitivity to just a 1c move in the US exchange rate. For a firm that has been struggling to break-even at best of late, the fall in the dollar from a first half average of $US1.01 to US90c in recent days has provided what Alumina chief executive John Bevan described as "significant leverage."