I don't understand the last part, but you can do the first part with a running total
Once the measure is on the sheet, right-click on the field and choose Quick Table Calculation, and then Running Total
I am getting the first part easily with running total calculation or running sum by writing a calculation.
For March month report:
IF I select Jan(-483907 + 122842) = (-361064)(India & Philippines)
IF I select Feb ( (-483907-201498) - (122842 + 304467.2) = -258905 (India & Philippines)
PFB the screenshot:
Hope this understand!