Probably the easiest way to ask this question is to show the sample XML and
then provide the desired result:

=============== sample xml ===============

<root>
    <order>
        <price>100</price>
        <conversion_rate>1.20</conversion_rate>
    </order>
    <order>
        <price>85</price>
        <conversion_rate>1.12</conversion_rate>
    </order>
    <order>
        <price>125</price>
        <conversion_rate>1.12</conversion_rate>
    </order>
    <order>
        <price>105</price>
        <conversion_rate>1.22</conversion_rate>
    </order>
</root>

=============== end sample xml ===============


*Desired Result*
I need to take the result of every (price div conversion_rate) and then sum
the total of their results..

This obviously throws an error:
<xsl:value-of
    select ="sum(root/order/price div root/order/conversion_rate)" />

In the above example, I need a result such as:
100 / 1.20 = 83.33
85 / 1.12 = 75.89
125 / 1.12 = 111.61
105 / 1.22 = 86.1
------------------------
Total: 256.93  <--------- desired result

fwiw: I do not need to see the above sub totals, they are only shown for
clarification; I only need the Total of 256.93 in this example.

Regards,
--
kindler chase