BizTalk 2009: BizTalk Mapper - get value from last node

I ran into a situation where I needed to get the last value from a re-occurring node that SAP was returning.

In order to extract the last record, I utilized the Record Count functoid and fed that value into the Index functoid. The Index functoid is also fed with the value from the "WA" element that I am really interested in. The result is then passed to a String Concatenate functoid where the data is enriched before being assigned to the destination document.