nothing shows UP!! (frustration! help!!)

<?xml version ="1.0"?>
<xsl:stylesheet xmlns:xsl = "http://www.w3.org/1999/XSL/Transform" version = "1.0">
<xsl:template match ="/">
	<p align="center">
	<font color ="blue">
	Piranha palace...
	</font>
	</p>
	<xsl:for-each select="SUMMARY/PRODUCT">
			<b>PRODUCT ID:</b><xsl:value-of select = "./@ID" /> <br/>
			NAME: <xsl:value-of select ="@NAME"/> <br/>
			PRICE PER UNIT : <xsl:value-of select = "@PRICE"/>
			<br/><br/>
			<xsl:for-each select = "ORDER">
			<b>ORDER NUMBER: <xsl:value-of select ="@ID"/></b><br/>
			SHIPPING ADDRESS: <xsl:value-of select ="SHIP_ADD"/>
			TOTAL QUANTITY: <xsl:value-of select ="QUANTITY"/><br/>

	ORDER VALUE:<xsl:value-of select = '(../@PRICE) * (QUANTITY)'/> <br/><br/>
	</xsl:for-each>
	<HR/>
	<b>PRODUCT SALES VALUE: <xsl:value-of select = '(./@PRICE) * sum(./ORDER/QUANTITY)'/></b>
	<br/>
	<hr/>
	<br/>
         </xsl:for-each>
</xsl:template>
</xsl:stylesheet>

<?xml version ="1.0"?>
<SUMMARY>
<PRODUCT ID = "P001" NAME = "Mini Bus" PRICE ="75">
	<ORDER OID = "O001">
	<SHIP_ADD>10 newstand</SHIP_ADD>
	<QUANTITY>30</QUANTITY>
	</ORDER>
	<ORDER OID = "O002">
	<SHIP_ADD>101 oldstand</SHIP_ADD>
	<QUANTITY>10</QUANTITY>
	</ORDER>
</PRODUCT>
<PRODUCT ID = "P002" NAME = "Barbie Doll" PRICE ="20">
	<ORDER OID = "O003">
	<SHIP_ADD>103 news</SHIP_ADD>
	<QUANTITY>60</QUANTITY>
	</ORDER>
</PRODUCT>
</SUMMARY>