Here’s another article I wrote for www.sharepointbriefing.com. This one describes a technique that we can in SharePoint Designer to perform calculations that aren’t possible using any of the built-in calculation-style activities. The basic idea is to use a custom list as a calculation engine – define a list that performs the calculation correctly, create an item via SPD and then read the result.
Here’s a teaser:
Follow me on Twitter at http://www.twitter.com/pagalvin