Aggregating calculated data

[Anonymous]

I am tring to aggregate data I have in a column by adding the data in the current row to all the previous rows. Sample data below shows the data in the Done column that I would like to aggregate to produce what I am showing in the Cumulative Done column:

Month	Done	Cumuluative Done
January	40	40
February		40
March	1	41
April		41
May	27	68
June	67	135
July	12	147
August	49	196
September	113	309
October	115	424
November	83	507
December		507

For my data, the Done column is actually a calculated column based on counts of the number of items that have been moved to Done for the given month. The Cumulative Done column is to represent how many have moved to Done YTD.

How do I calculate the Cumulative Done in Power BI so I can show it in a line chart.?