Excel CUBEVALUE & CUBESET count records greater than a number - excel

Question

I am writing a series of queries to my workbook's data model to retrieve the number of documents by Category_Name which are greater than a certain numbers of days old (e.g. >=650).
Currently this formula (entered in celll C3) returns the correct number for a single Days Old value (=3).
=CUBEVALUE("ThisWorkbookDataModel",
"[Measures].[Count of Docs]",
"[EDD_Report].[Category_Name].&["&$B2&"]",
"[EDD_Report_10-01-18].[Days Old].[34]")
How do I return the number of documents for Days Old values >=650?
The worksheet looks like:
A B C
1 Date PL Count of Docs
2 10/1/2018 ALD 3
3 ...
UPDATE: As suggested in #ama 's answer below, the expression in step B did not work.
However, I created a subset of the Days Old values using
=CUBESET("ThisWorkbookDataModel",
"{[EDD_Report_10-01-18].[Days Old].[all].[650]:[EDD_Report_10-01-18].[Days Old].[All].[3647]}")
The cell containing this cubeset is referenced as the third Member_expression of the original CUBEVALUE formula. The limitation is now that the values for the beginning and end must be members of the Days Old set.
This is limiting, in that, I was hoping for a more general test for >=650 and there is no way to guarantee that specific values of Days Old will be in the query.

Answer 1

First time I hear about CUBE, so you got me curious and I did some digging. Definitely not an expert, but here is what I found:
MDX language should allow you to provide value ranges in the form of {[Table].[Field].[All].[LowerBound]:[Table].[Field].[All].[UpperBound]}.
A. Get the total number of entries:
D3 =CUBEVALUE("ThisWorkbookDataModel",
"[Measures].[Count of Docs]",
"[EDD_Report].[Category_Name].&["&$B2&"]"),
"{[EDD_Report_10-01-18].[Days Old].[All]")
B. Get the number of entries less than 650:
E3 =CUBEVALUE("ThisWorkbookDataModel",
"[Measures].[Count of Docs]",
"[EDD_Report].[Category_Name].&["&$B2&"]"),
"{[EDD_Report_10-01-18].[Days Old].[All].[0]:[EDD_Report_10-01-18].[Days Old].[All].[649]}")
Note I found something about using .[All].[650].lag(1)} but I think for it to work properly your data might need to be sorted?
C. Substract
C3 =D3-E3
Alternatively, go for the quick and dirty:
=CUBEVALUE("ThisWorkbookDataModel",
"[Measures].[Count of Docs]",
"[EDD_Report].[Category_Name].&["&$B2&"]"),
"{[EDD_Report_10-01-18].[Days Old].[All].[650]:[EDD_Report_10-01-18].[Days Old].[All].[99999]}")
Hope this helps and do let me know, I am still curious!