How would I write this function in PBI ?

[Crazydog]

How would I write this function in PBI ? currently it is in tableau. 

IF [ Status ] = "# of Active"
and DATETRUNC('month',[Snapshot Date]) = DATETRUNC('month',DATEADD('month',-1,{MAX([Snapshot Date])}))

THEN [Issue Creation Date]

ELSEIF [Status ] = "# of Resolved"
and DATETRUNC('month',[Snapshot Date]) = DATETRUNC('month',DATEADD('month',-1,{MAX([Snapshot Date])}))

THEN [Date*]

END

[Crazydog]

This is what i am trying to get. Performance by month. Above formula I have in tabelau.

[Greg_Deckler]

@Crazydog Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.