[Translation from Japanese to English ] I would like to use "First Class Mail" for shipping. However, in the invoice...

Original text

私は「First Class Mail」での出荷を希望します。
しかしながら、あなたから送ってもらったインボイスは、
メールの文面では「Total:$63.43」になっていますが、
メールからチェックアウトのページに飛ぶと、「Total:$75.48」になっています。
これは「Priority Mail」の金額です。
訂正してインボイスを再送してください。
よろしくお願いします。

Translation / English

I would like to use "First Class Mail" for shipping.
However, in the invoice you sent me, even though the e-mail text indicates "Total:$63.43", I get "Total:$75.48" when I go to the checkout page from the e-mail link.
This price is for "Priority Mail".
Please send me a corrected invoice.
Thank you in advance for your help.

Translation / English

I would like to request you to ship the item by the “first class mail”.
However, the invoice you sent to me by the email indicated the amount as “Total: $63.43, on the other hand, when I followed the link in your email to the checkout page, the amount was indicated as “Total: $75.48.
This amount is for the “priority mail”.
Please correct the invoice and send it to me again.
Thank you for your cooperation.