[xsl] XPath 1 For Loop

["peter verhaar" <peter.verhaar1@xxxxxxxxx>]

Hello,

This line works fine in Saxon 9:

<xsl:variable name="totalNumber" select="sum(for $a in $inputSet
return number(replace($a,',', '.')))"/>

But with Xalan 2.7 it start to complain:

SystemId Unknown; Line #34; Column #132; Expected ,, but found: $

I found out that For-loop is new in XPath 2.

How can I change this to XPath 1 so it works with Xalan 2.7?

Thank you!