I've spent time getting my MDX to work; here is the code so far:

iif(isleaf([Enr Mo].CURRENTMEMBER) and isleaf([Atcc].CURRENTMEMBER) and isleaf([Proj Horizon in Years].CURRENTMEMBER)

,

[Measures].[Circ]

,

iif(not(isleaf([Enr Mo].CURRENTMEMBER)) and isleaf([Atcc].CURRENTMEMBER) and isleaf([Proj Horizon in Years].CURRENTMEMBER),

([measures].[circ],[Enr...