Because I use square to track my inventory, I need to be able to create an invoice that has a zero balance (for a few reasons). First, if I am donating product, I need to track that through square. I also want a hard copy record of this donations. Secondly, if I do a product trade with someone, I want to indicate that on my invoice (again to track my inventory). When I have done this, square tells me that inovices need to be at least $1. WHY???
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