round() in sum()

[pat]

Hello,

I need to round floats and then sum them. Currently I have something like this:
<xsl:variable name="previous-page-subtotal" select="sum(preceding::price)"/>

but I need this:

sum(round(preceding::price)) or something like this.

The FOP version is 0.20.5

Any idea?

Thanks a lot.

     Pat

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