XPath in XQuery: Fractional Digits

XPath in XQuery: Fractional Digits

I have an output XSD that looks like this:

<xs:simpleType name="Money">
  <xs:restriction base="xs:decimal">
       <xs:fractionDigits value="2"/>
   </xs:restriction>
</xs:simpleType>

From this I use a statments

fn:sum($Accounts/in:IndividualAcct[in:AcctType = 'AttcRec']/in:balance * in:amount)

But my summation to a field defined witht the definition above appears as:

36745.770000000004

What I am looking for is only 2 fractional digits

So I am wondering, can I use something like a format-string or fn:string

If so, can I combine this with my previous fn:sum string listed above

What would that look like?

Thanks