This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
A SAX parser will call your startElement() method when the <sal> element is encountered. There will then be one or more calls to your characters() method where you need to capture the text. Next there will be an endElement() call when </sal> is encountered - at that point process the captured text to extract the numeric value.