Filament (ZAR), estimated mass (g), electricity at your R/kWh, operator time.
From your slicer (includes infill & supports if slicer counts them).
Municipal resale differs; use your bill’s effective R/kWh if unsure.
Optional: pick a model to load a planning wattage (rated first, else typical). Adjust manually for your setup.
Prep, start, unload, QC — not necessarily full print duration.