What a unit actually costs by the time Amazon pays you — factory price, freight, duty, and the fees that come off every order. Change any input and everything recalculates.
Every deduction between the selling price and what you keep, in the order it hits. Landed cost is only the first bar — on most FBA products, Amazon's cut is bigger than the factory's.
The two numbers you actually negotiate: what you charge and what the factory charges. Each cell is the net margin at that combination, with your current inputs highlighted. Read a row to see what a price change buys you; read a column to see what winning 10% off the factory quote is worth.