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I'm sorry you're having to work in such conditions. In Kentucky there is a state agency that can assist. https://apps.labor.ky.gov/onlinecomplaint/
If they fire you you would have a valid lawsuit for retaliation
I would submit the complaint for all of it. Retail is not your primary function.
Yes. I thought I was clear that you are entitled to all of it in my opinion. Mandatory trainings as well.