ご連絡ありがとうございます。
追加の送料がかかるようであれば、他の配送方法や、別の住所を検討した方が良いかもしれません。
ちなみにRoyal mailはFedexよりも割高ですか?
Thank you for your reply.
If there is going to be an additional shipping cost, it might be better for me to consider different delivery method or selecting different address.
By the way, is Royal mail more expensive than Fedex?