Once you know the selling price and direct costs of each product or service unit you sell, you can calculate your contribution margin in dollars per unit.

一旦你知道了产品或服务的零售价和直接成本，你就可以计算出单位产品边际收益。

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The adjusted EBIT margin rose from 4.2% to 4.5%, driven by our focus on medium haul and higher margin product, careful capacity and cost management and a strong contribution from our acquisitions.

调整后的息税前利润率由原来的4.2%上升至4.5%，这主要是来自于我们对中程目的地和高利润产品的关注、用心的运力和成本管理以及收购活动的大力贡献。

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