[3.1.2.1 结算](3.1.2.1%E7%BB%93%E7%AE%97.md) [3.1.2.2 销账](3.1.2.2%E9%94%80%E8%B4%A6.md) [3.1.2.3 客户结余](3.1.2.3%E5%AE%A2%E6%88%B7%E7%BB%93%E4%BD%99.md) [3.1.2.4 客户对账](3.1.2.4%E5%AE%A2%E6%88%B7%E5%AF%B9%E8%B4%A6.md)