I have just ordered your product, please correct the shipping charge. I would like to pay in full.

我刚拍下了您的商品，请修改一下邮费，我要合并付款。

youdao

Shipping charge: some buyers might think our shipping charge is high. But the fact is NOT, we charge you based on the actual shipping cost.

中文梗概：关于运费：有的买家可能会认为我们的运费偏高，其实不然，运费是根据实际运输成本来计算的。

youdao

Today, we have moved the cargo from ocean freight warehouse to air freight warehouse. It will be shipped tomorrow. The shipping charge is RMB500. Please confirm.

今天货物已从航运仓库转送到空运仓库，明天发货，其中的运输费为500元人民币，请确认！

youdao

You could get nothing and a shipping charge.

CNN: Watch out for too-good-to-be-true free PCs

It is not uncommon for retailers to tout free shipping benefits, but then charge a higher price per item to cover their expenses as a result of the shipping policy.

FORBES: 7 Tips For Avoiding Shipping Costs When Shopping Online

Allow Trinity House, which oversees shipping safety, to charge for services on open market to cut costs for existing users.

BBC: Bill-by-bill: Guide to MPs' private members' bills