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I found on an invoice the shortcut QTTY that stands for the word quantity.
Simplified part of the invoice:
Item | QTTY Unit | Unit Price |Total Price
Product X | 2 | 100.00 | 200.00
...
Would you use QTTY or QTY? Or any other form?
I would say that QTY is used more commonly, though looking through a handful of invoices I have to hand, they all use quantity instead of an abbreviation.
Just say Unit Count for your fixed column. And please don’t abbreviate quantity.
