Data Directive Assistance on Supplier Price List

In Supplier Price List, I am try to send an alert when the Price Per is changed from /1 to something else.
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Here is my condition:

I get this error when i save it. I realize that is it not liking the “/”
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So i add parenthesis around /1. It lets me save it without error.

However, it does not appear to be working for me. How to I accomplish this?

Okay, I just figured it out.