为了获得你所需的发货票数据，你总要做如下一些事情。

To get the invoice data you need, you would do something like this.

作为我方代理，每销售一笔货您将得到占发货票金额3%的佣金。

As our agent, you is to receive 3% commission of the invoice value on every sale you have make.

当适用时，税和费用在我们的发货票上可作为单独的费用出现。

Such taxes and costs, when applicable, will appear as separate charges on our invoices.