[如何定义费用项并对其上线](%E5%A6%82%E4%BD%95%E5%AE%9A%E4%B9%89%E8%B4%B9%E7%94%A8%E9%A1%B9%E5%B9%B6%E5%AF%B9%E5%85%B6%E4%B8%8A%E7%BA%BF.md)