You'll probably be able to buy supplemental insurance at an extra cost.

再多付一些钱的话，你或许就能买附加险。

Your wedding ring can be engraved with a personal inscription at no extra cost.

你的结婚戒指可以刻上个人题字不另收费。

So, plan on that extra cost.

因此，计划在额外的成本。

There will be no extra cost.

没有额外的费用。

Consumers end up bearing this extra cost.

消费者最终承担这笔额外成本。