title: Sum IIF Expression
body: <p>Im trying to sum an expression in visual studio and just keep getting an #error but not sure why as this si the first time i have tried to sum an expression, only ever done it on a single field before. Any Suggestions!!!</p>
  
  <pre><code> =IIf(Fields!STATUS.value = "Completed" AND Fields!DONOTINVOICE.value = True, Fields!ORDERCOST.Value, "")
  </code></pre>