By Eric Volkman The Montley Fool August 25, 2012 Starbucks ( Nasdaq: SBUX ) is a company heavily dependent on one commodity: raw arabica coffee. It's nice, then, that prices for those beans have generally been dropping in recent months. And based on futures contract data, that trend looks as if the trend will continue. So that seems a clear win for the company and other arabica buyers. But not all business advantages can be exploited equally, and Starbucks might not be the company best positioned to capture the opportunity. Drier and cheaper The prolonged dry weather badly affecting crops in the U.S. has been beneficial for certain commodities abroad, most notably coffee. An unusually heavy bout of wet weather affecting output in java-growing countries several years ago is largely over, bringing production back to former levels. Forecasts indicate that production in Colombia, for example, could reach a half-decade high of 9 million bags (appr...