Rolling up previous Months Data to current month

[RobRayborn]

I need to project the on hand amount until the end of the current year.
I have the [Inventory Value] as of the LASTNONBLANK(fDates [Date], so essentually today's date.

I have Purchase Orders of incoming material to add to my [Inventory Value] for the current month, and into future months.  Unfortunately I also have some Purchase Order amounts that are lingering in the prevous month that I need rolled into the total of the Current month.

Can I please get some assistance with rolling up the Past Due Purchase orders?  In this case I am using a Matrix visual with the Product down the left side and the Months across the top.

Thank you.

[lbendlin]

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-...
Please show the expected outcome based on the sample data you provided.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523

[RobRayborn]