PepsiCo Profit Up, Cuts Jobs; Shares Rise  NEW YORK (Reuters) - PepsiCo Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PEP.N target=/stocks/quickinfo/fullquote"&gt;PEP.N&lt;/A&gt;, the world's No.  2 soft drink company, on Thursday said quarterly profit rose  due to tax benefits and strong performances from its key  Frito-Lay snack and North American beverage businesses and  raised its full-year profit forecast.