In an object model, it is perfectly valid to re-compute the total from the item lines.
在对象模型中,根据每个产品项重新计算总价格是完全合理的。
2
For example, with an online purchase, you want to store not only the item lines but also the total amount, because the buyer has approved the total amount.
比如,对于在线购买,需要存储的不仅仅是每个产品行,还包括总价格,因为买主已经认可了总价格。
3
So the next line itemto look at is called Total Current Assets.