Need help with Month over month calculation

[ashwinkolte]

I have input dataset like this :

Item	Sub Item	Month	Cost
Item 1	Subitem 1	30-Jun-23	200
Item 1	Subitem 2	30-Jun-23	300
Item 1	Subitem 1	31-May-23	400
Item 1	Subitem 2	31-May-23	600
Item 2	Subitem 1	31-May-23	500

I want to caculate Month over month cost saving  i.e June month cost - May month cost for the various items and subitems .

Require a matrix outout like this -

Item	Sub Item	30-Jun-23	31-May-23	Cost Saving
Item 1	Subitem 1	200	400	-200
Item 1	Subitem 2	300	600	-300
Item 2	Subitem 1	-	500	-500
	Total row	500	1500	-1000

I

The challenge I am facing is this .. If you see the Item 2 in the input data ,  It does NOT have any record (i.e cost)  for June month . There is May cost which is 500 . In this case I want June cost to be considered zero and cost saving calculated as (0-500) = -500 and the above matrix to be created with proper totals 

In other words it is as good as inserting below row in input data 

Item 2

Subitem 1

30-Jun-23

0

[v-cgao-msft]

Hi @ashwinkolte ,

Please reference the table in powerquery.

Select the month column and pivot.

add a custom column.

create a new table visual.

Best Regards,
Gao
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly. If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

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[ashwinkolte]

Hi @v-cgao-msft 

The table in question is a calculated table . Hence cannot edit in power query . Also please note that the real life data would contain many months and not just june and may