Month to month calculation of the number of due dates

[mouradayadi]

Hello,

I am new to Power Bi and I want to create a new table from an existing table. I have the following table as a source:

The table I want to calculate looks like this: (I created it manually)

Is there a function with which I can subtract the processed issues from month to month, starting from the initial value

Thanks in advance!

[lbendlin]

Please provide sanitized sample data that fully covers your issue.
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-...
Please show the expected outcome based on the sample data you provided.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523