InfillQuote breaks costs into 4 rigorous tiers: (1) Direct Production: filament/resin weight (plus AMS/MMU flush waste), active electricity (printer wattage × local kWh rate), machine depreciation per print hour, and hands-on labor (setup, slicing, post-processing). (2) Operational Buffers: failure risk rate %, extra hardware/screws, and packaging. (3) Indirect Costs: rent and utilities, allocated R&D material testing, and customer acquisition/marketing. (4) Selling Price: applies your target profit markup and automatically reverses marketplace/gateway transaction fees so your net profit is guaranteed.