My Craftbot Plus slicer called Craftware estimates a job filament cost when a cost per meter is entered as a parameter. I made a spreadsheet to guestimate costs for PLA, ABS and PET XT based on invoiced prices excluding shipping and tax. If you have better cost estimates per meter using the same prices I paid, $22 per kilo gor PLA and ABS and $57 for .75 kilo of Colorfabb XT PET or fixes for density estimates, etc., please feed back. Thanks! Here’s a link. https://docs.google.com/spreadsheets/d/1Ooq14QzTgmZZY9GKBlDLIBaGwyxCq9sAvedjRU\_eWCU/edit?usp=sharing

Can’t tell if my post on filament costs per meter was published so adding this comment. If you have any calcs or known costs per meter yourself, please comment.

With the help of your sheet I updated my own calculation sheet. It looks like I had some deviation in total amount of meters per spool. So I updated my own sheet with the help of your calculation method. Great work!