I have what I think is a horrible xml file to work with and don't know how I 
can do this with xsl. Using the xml file excerpt below I need to sum the 
price for each /Order/Prod/Prod/@nID that is equal to 
/Order/Summary/Report/Record/AssocProductID where (SelNo=0 and @tID=0) or 
(@nID=2 and @tID=9).

Any suggestions would really be appreciated. Nothing I can think of to try 
gets the results I need.
Thank you, Sarah

<Order>
	<Prod>
		<Prod nID="93"/>
		<Prod nID="227"/>
	</Prod>
	<Summary>
		<Report>
			<Record nID="1" tID="0">
				<Price pvalue="8976"/>
				<SelNo>0</SelNo>
				<AssocProductID>93</AssocProductID>
			</Record>
			<Record nID="1" tID="0">
				<Price pvalue="8976"/>
				<SelNo>1</SelNo>
				<AssocProductID>93</AssocProductID>
			</Record>
			<Record nID="2" tID="9">
				<Price pvalue="600"/>
				<SelNo>0</SelNo>
				<AssocProductID>93</AssocProductID>
			</Record>
			<Record nID="3" tID="9">
				<Price pvalue="200"/>
				<SelNo>0</SelNo>
				<AssocProductID>93</AssocProductID>
			</Record>
			<Record nID="3" tID="9">
				<Price pvalue="400"/>
				<SelNo>0</SelNo>
				<AssocProductID>93</AssocProductID>
			</Record>
			<Record nID="1" tID="0">
				<Price pvalue="855"/>
				<SelNo>0</SelNo>
				<AssocProductID>227</AssocProductID>
			</Record>
			<Record nID="1" tID="0">
				<Price pvalue="825"/>
				<SelNo>1</SelNo>
				<AssocProductID>227</AssocProductID>
			</Record>
			<Record nID="1" tID="0">
				<Price pvalue="30"/>
				<SelNo>2</SelNo>
				<AssocProductID>227</AssocProductID>
			</Record>
			<Record nID="2" tID="9">
				<Price pvalue="400"/>
				<SelNo>0</SelNo>
				<AssocProductID>227</AssocProductID>
			</Record>
			<Record nID="3" tID="9">
				<Price pvalue="400"/>
				<SelNo>0</SelNo>
				<AssocProductID>227</AssocProductID>
			</Record>
			<Record nID="1" tID="5">
				<Price pvalue="500"/>
				<SelNo>0</SelNo>
				<AssocProductID>0</AssocProductID>
			</Record>
		</Report>
	</Summary>
</Order>