null values in current month vs previous month

[#1]

Hi All

I'm calculating the current months total sales and previous month total sale

i want a condition where current month sale is =0 then the previous month sale should be zero

For suppose in current month if i have only one country where sales aree done

i want to see that country in the previous month remaining should be null

belo is the senario

in the above image i'm getting data from the remaining countries as well i dont want to see the remining country data

[vishsaggi]

Did you try checking Supress value when null in the dimensions tab of your chart properties ? Can you share a sample app if possible?

[#3]

yes i did it but the values i'm calculating are from expressions so no use on doing that

can we supress zeros in set expressions

[vishsaggi]

In the presentation tab  did you check supress zero values ?

[#5]

Yes i did it but no use

[vishsaggi]

Can you share your app or what is the expr you are using ?

[Anil_Babu_Samineni]

What expression you've tried for observers