回答
- Once I have confirmed the delivery fee, I will send you the estimate and the invoice.
- Once the shipping fee has been decided, I still send you the estimate and the invoice.
「送料が確定しましたら見積書と請求書をおくります。」は英語ではこのようです。Once I have confirmed the delivery fee, I will send you the estimate and the invoice.Once the shipping fee has been decided, I still send you the estimate and the invoice.「送料」は英語では delivery fee や shipping fee に相当します。「〜確定する」 → to have be decided, to confirm「見積もり」→ estimate「請求書」→ invoice, billご参考までに。
回答
- Once the shipping fee is confirmed we will send the quotation and the invoice/bill.
- We will send you the quotation and the invoice/bill when the shipping fee is final.
まずメインの単語ですが、送料＝shipping fee見積書＝estimate, quotation請求書＝bill, invoice確定＝ confirm, finalize, final, decidedとなります。Once the shipping fee is confirmed / when the shipping fee is final = 一度送料が確定したら、送料が確定したらwe will send the quotation and the invoice = 我々は見積書と請求書を送ります
アメリカ合衆国 
日本 
