SumX problems with variables

[ThomasWeppler]

Hi Power BI community

I have a problem with the use of sumx and variables together.
Sumx doesn't show to total in my table.

Income =

var _closed = [Closed]

var _assinment = CALCULATE(SUMx(Invoice,Invoice[income]), (Invoice[invoicedate]) > _closed)

Return

IF(ISBLANK(_assinment),0,_assinment)

 
This gives me the right result on for each row, but doesn't sum up correctly

I have also tried to sumx the messaure

sumx Income = SUMX(Invoice, [income])

It gives the wrong results on each row, but add all the wrong results up.

I want to get the right results and add them up. Can anyone help me with that?
All help is greatly appreciated.

[ThomasWeppler]

Thanks @Greg_Deckler 
I worked a bit with it and ended up solving my problem with a summarize function.

[Greg_Deckler · Accepted solution]

@ThomasWeppler First, please vote for this idea: https://ideas.powerbi.com/ideas/idea/?ideaid=082203f1-594f-4ba7-ac87-bb91096c742e

This looks like a measure totals problem. Very common. See my post about it here: https://community.powerbi.com/t5/DAX-Commands-and-Tips/Dealing-with-Measure-Totals/td-p/63376

Also, this Quick Measure, Measure Totals, The Final Word should get you what you need:
https://community.powerbi.com/t5/Quick-Measures-Gallery/Measure-Totals-The-Final-Word/m-p/547907

Also: https://youtu.be/uXRriTN0cfY
And: https://youtu.be/n4TYhF2ARe8