Hi Rob,

This is quite do-able. I'm pasting some sample code below. You may need to add additional logic to handle the large item but I hope this sets you in the right direction. So you can calculate against the subTotalAmount for your base charge. For the large item, you need to find them in the in/salesOrder/salesOrderDetails/ nodes. You can paste the code in your Rate field and use the Test Run tab to help you adjust. You can also change the Sample Input in the Test Run tab to simulate the different values.

Here's a good XSL reference http://www.w3schools.com/xsl/

<xsl:transform version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
<xsl:template match="/">
<out>
<shippingAmount>
<xsl:variable name="baseShippingAmount">
<xsl:choose>
<xsl:when test="in/salesOrder/subTotalAmount >= 0 and in/salesOrder/subTotalAmount <= 100">
10.00
</xsl:when>
<xsl:when test="in/salesOrder/subTotalAmount > 100 and in/salesOrder/subTotalAmount <= 200">
15.00
</xsl:when>
<xsl:otherwise>
0.00
</xsl:otherwise>
</xsl:choose>
</xsl:variable>

<!-- Now add more logic to handle freight cost for large items below...
You may have to find all large items in order detail items under in/salesOrder/salesOrderDetails/...
-->
<xsl:variable name="largeItemShippingAmount">
0.00
</xsl:variable>

<!-- Generate the sum of the two charges. This is the final shipping calculation charge -->
<xsl:value-of select="$baseShippingAmount + $largeItemShippingAmount" />

</shippingAmount>
</out>
</xsl:template>
</xsl:transform>

You can just keep adding more test logic to the same shipping rate calculation. For example, let's say in addition to the base rate, you want to charge an extra $3 surcharge for every large item over 10 grams, you can do so like this:

<xsl:transform version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
<xsl:template match="/">
<out>
<shippingAmount>
<xsl:variable name="baseShippingAmount">
<xsl:choose>
<xsl:when test="in/salesOrder/subTotalAmount >= 0 and in/salesOrder/subTotalAmount <= 100">
10.00
</xsl:when>
<xsl:when test="in/salesOrder/subTotalAmount > 100 and in/salesOrder/subTotalAmount <= 200">
15.00
</xsl:when>
<xsl:otherwise>
0.00
</xsl:otherwise>
</xsl:choose>
</xsl:variable>

<!-- Count the number of large item order detail items -->
<xsl:variable name="numLargeItems" select="count(in/salesOrder/salesOrderDetails/salesOrderDetail[string(weight) and weight >= 10])" />

<!-- Generate the sum of the two charges. This is the final shipping calculation charge -->
<xsl:value-of select="$baseShippingAmount + ($numLargeItems * 3.00)" />

</shippingAmount>
</out>
</xsl:template>
</xsl:transform>