Subtract values from same column

[M_SBS_6]

Hi, Is there any calculation that I can do in a matrix table that would allow me to subtract one value in a column by another value in the same column? 

I have attempted to do here but the values don't change:

(if(apps[curr_month] = "Yes" && 'apps'[app_cat] = "YTL", 'apps'[amount]

-

if(apps[curr_month] = "Yes" && 'apps'[app_cat] = "INT", 'apps'[amount]

Example current output 

App_cat Jan

YTL.       40000

INT.        100000

Output I'm trying to achieve. The INT value takes the 10000 from the above table and subtracts the value for YTL.

App_cat  Jan

YTL.         40000

INT.          60000

[Ashish_Mathur]

Hi,

Assuming Amount is a measure that you have already written, write this measure

Measure = [Amount]-calculate([Amount],'apps'[app_cat]="YTL")

[M_SBS_6]

Thanks for your suggestion. I have tried this measure but all that seems to happen is my value for "YTL" returns a 0. 

[Ashish_Mathur]

You are welcome.  What happens to the INT value?

[M_SBS_6]

The same value remains, 100000. 

[Ashish_Mathur]

Share the download link of the PBI file.