求翻译：Producer surplus measures the benefit to sellers of participating in a market. It is measured as the amount a seller is paid minus the cost of production. For an individual sale, producer surplus is measured as the difference between the market price and the cost of production, as shown on the supply curve. For the market, total producer surplus is measured as the area above the supply curve and below the market price, between the origin and the quantity sold.是什么意思？

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