设计一个实用的小型商店销售管理系统 二.功能： 1.　　登记收入支出 2.　　统计每日或每周的销售情况，按规定格式打印销售报表 3.　　允许多种方式查询货物情况 4.　　按货物销售情况提前发出预报-practical design a small shop sales management system 2. Functions : 1. Revenue expenditure registered two. Statistics daily or weekly sales, as required format Print sales statements 3. For a variety of ways to allow cargo 4. Sales of goods by the early forecast issued