relative sum measure

I need to create a cumulative sum measure.

In the value 2 (type int column) the measure needs to add 25 + 20 (referring to the value 1 of the type int column) and present the total of 45 beside it.

I have attached the example file.

Thanks if anyone can help.

https://drive.google.com/file/d/1fqOpOozMKxHQo2f0StvwSFwUIGG_Mw5g/view?usp=sharing