Remaining cumulative curves start fron non-zero

Hi All,

I am try to produce three cumulative curves, one for budgeted, one for actual and one for remaining.

I have no issue with budgeted and actual curves, but I don't know how to start the cumulative remaining curves from non-zero point. (As screenshot shows)

The actual curve is running until data date, ideally, I want the remaining curves start from the point where actual curve ended in vertical line (Data Date).

Is there anyone could give me some idea on how to set that up?

Thank you.

Regards,

Tommy