Track your usage in Octopi--once a project is printing, it will display the total meters of filament used. Material Location: Shelves next to 3D printersUnit Cost: $0.10Unit: meterEquipment: 3d PrinterMonoprice Select Plus 3d Printer (printer #5)3d Printer AFP 512 (printer #1)Palette+ 3d Printer Filament Splicer3d Printer StationMonoprice Mini (printer #2)Monoprice Mini (printer #4)Monoprice Mini (Printer #3)Monoprice Select (printer #7) Supplier Source Information These are the suppliers that MakeHaven purchases these items from. Material Source: 30 spools iiid Max(OLD) Sunlu, Via Amazon