Lets say I have the following:

<Products>
    <Product id="123">
       <Name>Something</Name>
       <Variant>
           <Color>Yellow</Color>
           <Price>12.99</Price>
       </Variant>
       <Variant>
           <Color>Red</Color>
           <Price>11.99</Price>
       </Variant>
    </Product>
    <Product id="124">
       <Name>Something Else</Name>
       <Variant>
           <Color>Yellow</Color>
           <Price>12.99</Price>
       </Variant>
       <Variant>
           <Color>Red</Color>
           <Price>10.99</Price>
       </Variant>
    </Product>
</Products>
...and I want to sort them so that
    i) the variants are in ascending price order within each product,
and
    ii) products are in ascending lowest price order within Products

how do I do this?

I have the following XSLT

<xsl:template match="/">
<Products>
	<xsl:variable name="SortedProducts">
		<xsl:for-each select="Products/Product">
			<xsl:element name="Product">
				<xsl:attribute name="id"><xsl:value-of
select="@id"/></xsl:attribute>
				<xsl:for-each select="Variant">
					<xsl:sort select="Price" data-type="number"/>
					<xsl:copy-of select="."/>
				</xsl:for-each>			
				<xsl:for-each select="*[not(Variant)]"><xsl:copy-of
select="."/></xsl:for-each>
			</xsl:element>
		</xsl:for-each>
	</xsl:variable>
	
	
	<xsl:for-each select="exsl:node-set($SortedProducts)/Product">
		<xsl:sort select="Price" data-type="number"/>
		<xsl:copy-of select="."/>
	</xsl:for-each>

</Products>
</xsl:template>

This results in two copies of the variants being generated. If I place
the for-each for *[not(Variant)] before the Variant copy, it doesn't
get sorted, but at least I only get one copy.

If I remove the *[not(Variant)] the sorting is correct but the other
elements are, of course, missing.

How do I go about copying and double sorting ?