英语翻译Payment to be paid by an irrevocable confirmed at Sight

英语翻译
Payment to be paid by an irrevocable confirmed at Sight Letter of Credit established for 100% of each cargo contract value through a prime international bank opened within 12 working days after signing the contract.Such Letter of Credit shall be settled,accepted and approved by Buyer and Seller not less than 30 days prior to shipment date.Letter of Credit to require,Seller’s commercial invoice,Bills of Lading,Certificate of Origin,Certificate of Weight and Certificate of Quality.
Seller’s invoice shall be calculated based on the price as shown in Clause 5.1,to give a value per Tones of Coal (US$/Tones).The invoice price shall be further multiplied by the Tonnes delivered,as determined in accordance with Clause 4.0 of this agreement to produce the invoice amount in US Dollars.The Seller shall provide 3 original copies of invoices; 2 copies original invoices to bank and 1 copy original invoice to the buyer.
Seller shall submit an invoice to Buyer by facsimile and by mail,accompanied by a copy of the Certificate of Weight and a copy of the Certificate of Analysis as soon as possible after the completion of delivery of the Coal.The invoice shall specify the amount of Coal delivered to Buyer,and the price of such Coal.

支付应支付的不可撤销确认即期信用证设立100 ％的每一个货物合同价值的一个主要通过国际银行内开设12个工作日内签订合同.这种信用证应解决,接受和批准的买方和卖方不得少于30天前,装运日期.信用证要求,卖方的商业发票,提单,原产地证书,重量证书和证书的质量.
卖方的发票应按下列方法计算的价格的基础上所显示的第5.1条,使每一个值吨煤（美元/公吨） .发票价格应进一步乘以吨交付的决定,按照条款4.0本协议产生的发票金额以美元结算.卖方应提供3原始发票复印件; 2份原始发票,以银行和1份原始发票给买受人.
卖方应提交发票,买方通过传真和电子邮件,附有证明书副本体重和证明书副本分析后尽快完成运送煤炭.发票应指定金额煤炭运到买家,价格等煤.