Option to remove "qty" from invoice

The qty field doesn't always make sense. My flat design fees are customized. It looks tacky (not high end at all) to bill for "1" kitchen design. It's not a set kitchen price; it's so much more intricate than that. Price = total. Not price x qty = total. I'd like the ability to not show a qty at all. Adding the ability to turn it off in the "configure" menu would be perfect.