Re: Setting values for variable

if I understand your description you want the sum of all Payment
elements plus 2% of the sum of all Balance elemnts that don't have a
sibling Payment so that's just

<xsl:value-of 
  elect="sum(Record/Payment) + 0.02 * sum(Record[not(Payment)]/Balance)"/>

as you see, no variables are required at all.

David

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