Exclude blank fields from automation

Hello

I set up an order form that contains all the items available to have their own column and as mandatory fields the user enters their name, email, managers name & email. This allows the user to complete 1 form only. They can order 1 item per category. Generally out of 10 products, staff only need 2 which means i have alot of blank columns per row and when the email is sent off for approval, it looks really messy including all of these columns with no value.

How can i exclude these columns from my approval process or can you think of a work around?

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