We look at object SA, V, and geometry and without slicing estimate print time and material usage. From there we factor in other costs such as machine time, labor, and packing and shipping.

We don't compare to injection molding to calculate price. When we say price competitive between 1 and 10k units, it's based on avg IM mold and units costs. It's pretty hard to find data on that though.

Yeah, good point. We don't yet let users assign different units to different models in the same purchase on our website, but can add that feature!