Kroger Quarterly Profit Slips  NEW YORK (Reuters) - Kroger Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KR.N target=/stocks/quickinfo/fullquote"&gt;KR.N&lt;/A&gt;, the largest U.S.  grocer, on Tuesday reported a lower quarterly profit, hurt by  debt costs even as sales rebounded in Southern California where  it was hit by a strike.