Starbucks Profit Climbs, Extra Week Helps  LOS ANGELES (Reuters) - Starbucks Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SBUX.O target=/stocks/quickinfo/fullquote"&gt;SBUX.O&lt;/A&gt;, the  world's largest coffee shop chain,  on Wednesday said quarterly  net profit rose 47 percent, helped by its aggressive store  expansion and an extra week in the period.