英语翻译
问题描述：
英语翻译
In other words,consumer reaction to a shipping fee schedule may be based on both the current fee
structure and also some function of the past fee structure(s).
As a summary measure we define SHtot to be the sum of the
three order size fees.This variable is used to compute a change in fees variable
答
换句话说,消费者对航运费用表的反应可能是基于当前的费用
结构和功能也有过去的收费结构（S）.
作为一个总结措施,我们定义shtot是的总和
三阶大小费.这个变量是用来计算费用的变化的变量