final invoice

基本解释

The orderer must then be prepared to respond to a request (callback, in this case) to process the final invoice.
订货方然后必须响应一个请求（在本例中是回叫）来处理最终的货物。
Calculating the initial and final price for an invoice involves a slightly more complex protocol between an orderer and invoicer.
计算一个账目的初始价值和最终价值，涉及到了定序者和结账者之间一个稍微更加复杂的协议。
Clients should find no surprises when receiving a final invoice, but if the consultant neglects to include shipping costs in preliminary conversations, such fees will prove problematic.
当收到最终发货单的时候，客户应当不会有出乎意料的发现，但是如果顾问疏忽大意，没有在初步沟通中将运输成本考虑在内，此类费用就会是个问题。