From one attempt to a completed order
Expected attempts = finished-part quantity / (1 − failed-attempt rate). Filament = grams per attempt / 1,000 × price per kilogram × expected attempts. Electricity = hours per attempt × average watts / 1,000 × price per kWh × expected attempts.
Hourly machine allocation = (purchase cost − resale value) / service hours + maintenance reserve. Multiply by hours per attempt and expected attempts. Labor = (setup minutes per order + finishing minutes per part × quantity) / 60 × labor rate.
From cost to price
Production cost is expected material + machine + electricity + labor + packaging + delivery + other order costs. Add the fixed transaction fee, then divide by (1 − target margin − percentage fee) to obtain the required price.
The suggested order price rounds up to the nearest cent. Per-part price divides that order price by quantity and is a display allocation; rounding a per-part price and multiplying it back may differ by a few cents. Payment fees in the main breakdown use the suggested price. The quote check and actuals use your quoted price.
Independent failures are an approximation
Each failed attempt is assumed to consume a full attempt of material, machine time, and energy. Finishing applies to successful parts only. Setup is charged once per order.
Partial failures, repeated setup labor, plate-wide correlated failures, customer refunds, machine scheduling, and different materials or machines within one order need separate adjustment. This is a single-material FDM costing tool, not a resin-process model.
Actuals and numerical boundaries
Actual material, machine time, and hands-on time are whole-order totals, without an additional failure multiplier. Entered packaging, shipping, other costs, and payment terms are held constant in the expected-versus-actual comparison.
The engine rejects nonfinite numbers, missing required inputs, fractional quantities, resale values above purchase cost, and margin-plus-fee combinations at or above 100%. Quantity is limited to 10,000 and a suggested order price to $1 trillion. A zero price has undefined margin.
What this result cannot tell you
A modeled contribution margin is not net profit or a guarantee of commercial success. Taxes, financing, customer acquisition, refunds, unentered overhead, demand, and market prices are excluded. Illustrative defaults are not current market data.
The app does not claim professional certification or independent audit. Reference links explain related methods and slicer concepts; they do not verify your data.