Staples Profit Up; Sees 4th Qtr in Line  NEW YORK (Reuters) - Staples Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SPLS.O target=/stocks/quickinfo/fullquote"&gt;SPLS.O&lt;/A&gt;, the top U.S.  office products retailer, on Tuesday reported a 26 percent jump  in quarterly profit due to higher sales of furniture,  back-to-school supplies and a strong performance in Europe.