Something like this would work:

[Code="Other"]

WITH MEMBER [C]

AS

SUM(NULL:Axis(1).Item(0).Item(Axis(1).Item(0).Count-1).Hierarchy.CurrentMember, [Measures].[Your Measure])

SELECT

{[Measures].[Your Measure], [c]} ON 0,

[Your Dimension].[Your Hierarchy or Attribute] ON 1

FROM

[Your Cube]

[/code]

Hope that helps 🙂