marginal profit
Economics term for the profit from producing one additional unit. Often contrasted with 限界利益 (marginal income/revenue).
See also: 限界利益
They determine the output level at the point where marginal profit becomes zero.
限界利益 is marginal income/revenue (sales minus variable costs), while 限界利潤 is marginal profit (marginal income minus marginal cost).
Compound of 限界 (limit, marginal) and 利潤 (profit). A technical term from economics.