DAX Vlookup with multiple values and contains logic

[deannapi]

I need to filter TableB of IDs based off a slicer for one of the TableB[ColumnC] column values.  

Then take IDs from TableA and if those IDs are in the new subset of TableB IDs, grab TableB[ColumnB].

Here is where I'm stuck on the DAX:

• If more than one value is selected from the TableB[ColumnC] slicer, then the IDs can be repeated with more than one TableB[ColumnB] occurence.  
• TableB[ColumnB] options are "Web" and "Other"
• if there is more than one occurence, then I need a new DAX logic
• if any results contain "other" then the final result is "Other". 
• if the results only contain "Web", then "Web"

To view the subset of TableB IDs from the slicer selection, I have:

WEB IDs = 
VAR FilterSels = 
VALUES(FilterTable[Source])

VAR FilterPIDs =
CALCULATETABLE(
    VALUES(FilterTable[PID]),
    FilterTable[Source] in FilterSels,
    FilterTable[Source Origin] = "Web"
)

// view the list of PIDs left after source selection
Var Concat =
CONCATENATEX(
    FilterPIDs,
    FilterTable[PID],
    UNICHAR(10),
    FilterTable[PID]
)

RETURN
Concat

Then I have the same DAX to check the "Other".

How do I combine these IDs into one check table, then check the IDs from TableA, then run a VLOOKUP with multi results, then a if result Contains logic?

Test Logic PBIX 

Excel Data and Calculations 

[Greg_Deckler]

@deannapi Not sure I fully understand this. Sample data and expected results would help tremendously. 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.

[deannapi]

I edited the message with links to an excel sheet and .pbix file.