Phil has the right Idea, I think I’ll start doing some car windshields
I didnt learn this in school or college or on a bike or by the Greatful Dead so it may be useless information.
However my attorney has also told me that all invoices should read “due on receipt” if not giving a discount net 30 or 15 0r 10 0r 7.
We made that same change Mike about 5 months ago. I did so after you and I spoke about the issue.
I know that is OT but I got paid couple days ago 
NEST has shorted me over $1200!