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"If you already pay for shipping then shipping adds no marginal cost."
by moralestapia 10mo ago
"If you already pay for shipping then shipping adds no marginal cost."
- OkayPhysicist 10mo agowell, yeah. That's what the phrase "marginal cost" means: if it costs $x to do something N times, and $x + $y to do something N+1 times, $y is the marginal cost.