Matrix Columns - Summary prior year 2021 in single column and details 202 Year-Month Side by Side

[Chewbc]

As shown above I want to show only Summary fro 2021 and details by month for 2022. How to go about and format it? All the values are taken from measures. 

[Chewbc]

The above is related to the earlier solution. All values in matrix are from measures. I have tried to get column A (sum of 6 mths value) and B (average of value) as above BUT you can't do much with sub and grand total visulaizations control.  Appreciate again @amitchandak your expertise how to go about having these columns right. 

[Chewbc]

Thanks @amitchandak the above suggestion work well. 

[amitchandak · Accepted solution]

@Chewbc , You can have a column like this 

if(Year([Date])<year(today()) , format([Date], "YYYY-MM") , format([Date], "YYYY"))