商务英语翻译（请勿用有道，google,谢谢！）

Translate the following about into spending.
1. We deal with you in painstaking this order. To guarantee duly shipment, please open in our favour an irrevocable letter of credit, the l/c must be 15 days before the shipment arrived at my place.
L2. Due to the destination is an inland city, we have to arrange sea-land intermodal transportation.
L3. If no specific instructions, we will be in accordance with the general practice wpa and war risk.
4. Because as insurance premium of risks, if you want to add planted changes the additional risk, and the additional premium is for the buyer's account.
5. You should ask transportation company or insurance company to put forward the claim, because these goods are damaged in transit.