请帮翻译以下句子急(英译汉)：

题目

请帮翻译以下句子急(英译汉)：
30% of the total order value payable as down payment against invoice, immediately after contract signature and issuing of a bank guarantee.
70% of the total order value payable under a confirmed, irrevocable, divisible and transferable letter of credit, issued by a first-class bank of ABC company and confrimed by a bank selected by QW company. payment out of the letter of credit will be done against presentation of the documents stated in ANNEX2 specified as follows:
60% of the total contract value
The Buyer, upon the receipt from the Seller for the advice for opening the L/C, shall with 20 days, open an irrevocable letter of credit in favour of the seller, for an amount equivalent to 60 % of the total value of the contract. The credit shall be available against seller`s draft(s) drawn at sight on the opening bank for 60 % invoice value accompanied by the shipping documents.
10 %, payable by Letter of Credit in 2 months after final acceptance against

答案

签订合同和开立银行保函后,须按发票立即支付订单总价值的30%作为预付款.订单70%的余款为（保兑的、不可撤销的、可分割的、可转让的并由ABC公司一流银行开具的,由QW公司选择的银行保兑的）信用证支付方式.信用证的款...