求大神帮翻译一下下面这段话

题目

求大神帮翻译一下下面这段话
Unless otherwise agreed upon between Buyer and Seller in Writing, the Buyer shall pay the Price reduced with 2% cash discount within twenty (20) days after the later of (i) receipt by the Buyer of a proper invoice, (ii) time of delivery of the Product (TOD) or (iii) within thirty (30) days without the 2% cash discount

答案

除非经买卖双方书面确认,否则买方应于（1）买方收到正规发票；（2）收到货物后20天内支付98%的款项（2%现金折扣）,或（3）30天内支付全款（无2%折扣）.