请英语专业人士帮我将这段 中文 翻译成 英文，很重要的东西，所以请务必认真

International logistics price is very expensive, and expenses are increased by weight, here are some international logistics company less than 500 g package fee:

There are a few buyers up the misunderstanding we freight, but relatively and these expensive international express delivery, actually we use have is a very economic post, but this post in each package weight had better not exceed 60 g, in order to ensure that all of the packages were safe destination, we will each item to separate out all mail, which we did not take combination of freight reasons.

If you buy DuoGe items at the same time, the international logistics processing complex, so can't guarantee separate mail packages can arrive at the same time, at the buyer can understand.