I did this in excel and transferred it to google sheets. feel free to make your own copy and blank the quantities. It works by you filling in the column of parts printed and then calculates how far you are through. Its helped me estimate when I’m going to need to change my filament so saved a bit there. Hope this helps.
Thanks to this tip, somehow I can us this idea to work with my current project. Some of my unfinish spreadsheets and other printing however maybe done http://www.digitekprinting.com/digital-printing because of insufficient time for me to work alone with this.