Zeroes into -

Have you tried adding something like this in the Cell Format under Number Format? 0;-0;"-"?  If you have a Custom Number Format, it follows the same formatting as Excel.  Excel Custom Number Format offers 4 arguments.  Argument 1 is for the Display of Positive Numbers, Argument 2 is for the Display of Negative Numbers, Argument 3 is for the Number Zero Format, and Argument 4 is for Text.  There are plenty of links on this subject online.  

Hope this helps

Add here in your Cube View and see what happens

I tested with a Cube View with derived 0's

Used [#,###,0;(#,###,0);"-"] in Number Format for Cell Format

Zeros turned in dashes

Also worked in a If Statement

If (CellAmount = 0.00) Then
    NumberFormat = [#,###,0;(#,###,0);"-"]
Else
    NumberFormat = [#,###,0;(#,###,0);0]
End If