Create calculated field for pivot table, subtracting 2 following Qtrs

[AmitM]

hi all,

This is the SQL data I imported into power pivot:

[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD]ProfitCenter_Name[/TD]
[TD]Account_Group[/TD]
[TD]Project_Group[/TD]
[TD]Fiscal_Year[/TD]
[TD]Q_FY[/TD]
[TD]Edition[/TD]
[TD]Edition_Type[/TD]
[TD]Revenue[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]2018[/TD]
[TD]Q4/18[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]5[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]BB[/TD]
[TD]BBB[/TD]
[TD]2019[/TD]
[TD]Q1/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]9[/TD]
[/TR]
[TR]
[TD]B[/TD]
[TD]CC[/TD]
[TD]CCC[/TD]
[TD]2018[/TD]
[TD]Q3/19[/TD]
[TD]Other[/TD]
[TD]External[/TD]
[TD]10[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]2019[/TD]
[TD]Q1/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]8[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]2019[/TD]
[TD]Q2/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]4[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]BB[/TD]
[TD]BBB[/TD]
[TD]2019[/TD]
[TD]Q2/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]...[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

I want to be able to add columns to a pivot table that will show what is the difference between one Qtr to the next one (i.e. next qtr-previous qtr), while applying this calculation on identical items (i.e. ProfitCenter_Name & Account_Group & Project_Group), having filters applied (such as: Edition, Edition_Type).

Example:
My desired pivot table will show the following:
[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]2018[/TD]
[TD]2019[/TD]
[TD]2019[/TD]
[TD]2019[/TD]
[TD]2019[/TD]
[/TR]
[TR]
[TD]ProfitCenter_Name[/TD]
[TD]Account_Group[/TD]
[TD]Project_Group[/TD]
[TD]Q4[/TD]
[TD]Q1[/TD]
[TD]Q2[/TD]
[TD]Q3[/TD]
[TD]Q4[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]3[/TD]
[TD]-4[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]BB[/TD]
[TD]BBB[/TD]
[TD][/TD]
[TD]-6[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]...[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

by using the above relevant data, as shown below:
[TABLE="class: grid, width: 500"]
<tbody>[TR]
[/TR]
[TR]
[TD]ProfitCenter_Name[/TD]
[TD]Account_Group[/TD]
[TD]Project_Group[/TD]
[TD]Fiscal_Year[/TD]
[TD]Q_FY[/TD]
[TD]Edition[/TD]
[TD]Edition_Type[/TD]
[TD]Revenue[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]2018[/TD]
[TD]Q4/18[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]5[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]2019[/TD]
[TD]Q1/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]8[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]AA[/TD]
[TD]AAA[/TD]
[TD]2019[/TD]
[TD]Q2/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]4[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]BB[/TD]
[TD]BBB[/TD]
[TD]2019[/TD]
[TD]Q1/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]9[/TD]
[/TR]
[TR]
[TD]A[/TD]
[TD]BB[/TD]
[TD]BBB[/TD]
[TD]2019[/TD]
[TD]Q2/19[/TD]
[TD]Actual[/TD]
[TD]Internal[/TD]
[TD]3[/TD]
[/TR]
</tbody>[/TABLE]
(With data being filtered using slicers) to display only Edition=Actual & Edition_Type=Internal)


Thanks!!