the economic surplus

To maximise his share of the economic surplus, a merchant wants to sell to each customer at a price as close as possible to the most that client would be willing to pay.

为了最大化经济剩余，商家就想以尽可能接近大多数顾客愿意支付的价格将（商品）出售给每一个顾客。

The doctrine of surplus value is the cornerstone of Marx's economic theory.

剩余价值学说是马克思经济理论的基石。

《新英汉大辞典》

PLUNGING unemployment, rocketing growth, soaring exports and a budget surplus: that is the story of Estonia as it bounces back from a precipitous economic collapse.

骤降的失业率，飞速增长的出口和有盈余的预算：这就是爱沙尼亚从险峻的经济危机中反弹的故事。