请帮翻译以下句子急(英译汉)：

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 valueThe 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 final acceptance sheet and Proforma invoice equivalent to 10 % of the contract value如果用机器翻译就不必来凑热闹了