I don't want to hide it .Its just that i need to do some mofification in the data afterwards and for that i need to have the field cummulative showing up the value only at the point where the quantity exists.
As in the above example only against the date 12/29/2017 and 0 for the others.
In general one gets the best help by providing a comprehensive explanation of an issue (rather than posting the same question on multiple forums). And provide better feedback than just "This is not working for me!!".
Maybe "Cummulative" is already a calculated field?
Anyhow, this might be a suggestion (the small box in the lower right hand corner, is the matrix visual I created):