如果说30%预付款,70%在确认发货以后30天付款.用英语怎么表达?

这种场合的翻译要考究,要书面化,要正式,不能随便说的。我在美国上大学,下面是我翻译的完整的句子：The payment should be paid 30% in,and the rest of the 70% could be paid after the comfirmation of the delivery。