Data Prep extract for all nulls

Maybe this is an enhancement request?  I have 24 columns of data that I would like to extract the rows based on all columns being null for that record.  Tried using Extract Rows, but finally realized I can't use this feature to get the result I am looking for.  If there was an option to "INCLUDE all rows where ALL key columns contain:" I would be set.  Otherwise, I have to work with more logic over X number of columns which is a pain. 
In the screen shot I would want to result to give me Port# 109,111,114, 117, etc.
 

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Janet Grimsley
VP, Business Intelligence
The Fauquier Bank
Warrenton VA
5403490215
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