ConAgra Profit Falls as Prices Rise  CHICAGO (Reuters) - ConAgra Foods Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CAG.N target=/stocks/quickinfo/fullquote"&gt;CAG.N&lt;/A&gt; on Wednesday  posted lower quarterly profit due to higher ingredient costs  and the sale of its chicken and agricultural products  businesses.