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The fixed percentage or fixed fee is determined at the outset of the project, while variable fee and target estimates are used as an incentive to reduce costs by sharing any cost savings.
通过分摊任何可节约成本，特别是当变量和目标使用费用估计用作奖励来降低成本时，我们需要在这个项目开始时确定固定百分数或固定费用。
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