dennisjm wrote:In 2.1.1 filament cost should be an extruder variable not a process variable. e.g., what if you're printing with a support material that costs a lot less than the primary extruder material...
True, but filament cost I think is more of an estimate. To me, it's not hugely important. As for right now, if you really wanted to calculate an even more accurate cost with a support material that was of a different cost than the main material, prepare a print without supports, and find that cost. Then go back, generate supports then tweak the support locations if needed, prepare to slice and get another cost estimate with supports on.
(Price with supports - Price without supports) X
Price per kg of support material
..........................1............................................... Price per kg of main extruder material
(ignore the periods, it was to space it better)
this will yield price of support material, then add it to (price without supports) and you should get a more accurate cost.