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# 容差范围内的单位费用

## 场景：

发票上的单位费用与采购订单相比，处于可接受的容差范围内。

## 操作：

系统接受发票上的单位费用，并且不做调整，直接处理该交易。

## 示例：

* **采购订单 (PO)：**
  * 单位费用：$5.00
  * 数量：500 件
  * 费用总额：$2,500.00
* **收到的发票：**
  * 单位费用：$5.10（在 2% 的容差范围内）
  * 数量：500 件
  * 费用总额：$2,550.00
* **容差级别：**
  * 单位费用容差：±3%

由于单位费用（$5.10）与采购订单相比处于 3% 的可接受容差范围内，系统将：

1. \*\*接受单位费用：\*\*系统接受发票上的单位费用 $5.10，因为它处于定义的容差限值内。
2. \*\*处理交易：\*\*系统根据发票上的单位费用和数量，按费用总额处理发票：
   * **费用总额 = 数量 × 单位费用**
   * **费用总额 = 500 件 × $5.10 = $2,550.00**
3. \*\*完成发票处理：\*\*系统不做任何调整，直接处理该交易并接受发票内容。

这种方式使系统能够处理费用中的小幅可接受差异，确保交易处理顺畅高效，避免不必要的拒绝或延迟。


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