<xsl:template match="price">
  <xsl:copy-of select="."/>
</xsl:template>

<xsl:template match="price[position()=4]">
  <xsl:copy-of select="self::*[. &gt;= preceding-sibling::price[1]]"/>
</xsl:template>

<xsl:template match="price[position()=3]">
  <xsl:copy-of select="self::*[. &gt; following-sibling::price[1]]"/>
</xsl:template>

David

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