Calculate measure from Cumulative column

[JOKA]

Hello, 

I´m having trouble understanding how to calculate a measure from a cummulative column that I get from the dataset. 

I have the following table:

- Date (aaaaa-mm-dd)

- Account

- Value (cummulative value for the account in the fiscal year starting in July)

The table is like this:

I also have a Calendar table and a dimension table for Account (levels: category-sucategory-account).

I´m trying to create a new measure that calculates the quarterly data, as the sum of the three months in the quarter, so I can visualize the following for each category of accounts (in this example only Account A):

Q1  |  35

Q2  |  24

I can´t use the sum of AMOUNT because I would be cummulating something that´s already cummulated.

Does anyone know how to solve this?

I would be very grateful for your help!!

[v-chuncz-msft]

@JOKA 

You may try using SUMX.

https://community.powerbi.com/t5/Desktop/Sum-of-values-in-a-measure-with-divide-measure/m-p/296768#M...