Calculated members In Excel 2013 - subtotals and grand totals missing

Question

I am using Excel 2013 to query an SSAS OLAP cube. I have selected 2 dimensions in the row area, and I need to consolidate specific combinations of members values of each dimension. To do this I have created calculated members which combine sets of members
of each dimension, as in the code example below.
These members produce the desired results except that I do not have any subtotals on a 3rd dimension in the row area (Internal segment name, cf. image below), nor grand totals in the pivot table.
I am fairly new that MDX and would appreciate any advice on how to correct the code below.
Code for the member [Manufacturing Item].[Item Type].[All].[Cards Contact]
AGGREGATE(
CROSSJOIN(
{[Manufacturing Item].[Item Type].&[CARD BODY OTHER],
[Manufacturing Item].[Item Type].&[CARD BODY],
[Manufacturing Item].[Item Type].&[SMART CARD]},
[Techno cards contact]

Answer 1

In my previous post, the solution happened to work because the combination of the calculated members was equal to the whole dimension. But I found a cleaner method: subtotals need to be calculated for the combination of all the calculated members, so the
logic is to create a set that contains all of them. Then aggregate the measure for this set only for subtotals. To do this, I have created the following calculated measure: 
IIF(
ISLEAF([Manufacturing Item].[Item Type].CurrentMember),
[Measures].[Manufacturing Volume],
SUM({[CalcMembers]},[Measures].[Manufacturing Volume])