英文譯中文, 謝謝!

There are 51 cartons showing on this invoice, but only 50 of them are goods and to be invoiced. The extra one carton is the paper cards of the customer and it is free of charge, thus not listed on the invoice.

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原文 (繁體中文)：
此單空運貨共51箱,此INVOICE只收50箱貨的貨款,另外1箱是客人咭紙,不用收錢,故沒有顯示在此INVOICE上.
2009-06-03 16:10:54 補充

多謝你兩位答我,但感覺好像有點欠些什麼的,麻煩有心人繼續回答,
2009-06-03 16:13:23 補充

其實第二位的答案我覺得可以,但問題是我的情況是:
我走貨是走了51箱,但發票上只顯示50箱的貨及收50箱的貨款,沒有顯示於發票上的一箱貨因為是客人咭牌,不用收款,所以不顯示在發票上

翻譯 (英語（)：
This list transports freight spatially the altogether 51 box, this INVOICE only receives 50 box of goods the loans, moreover 1 box is the visitor card paper, does not need to receive money, therefore does not have the demonstration on this INVOICE.
2009-06-03 16:10: 54 supplement

many thanks you two answer me, but felt probably a little owes any, the troublesome person with high aspirations continues to reply,
2009-06-03 16:13: 23 supplement

second answer I think actually may, but the question is my situation is:
I transported goods walked 51 box, but on the receipt only demonstrated 50 box of goods and received 50 box of loans, did not have the demonstration on receipt box of goods because was the visitor card sign, did not use the collection, therefore did not demonstrate on the receipt

http://www2.worldlingo.com/zh_tw/microsoft/computer_translation.html

We have listed 51 cartons delivered on the invoice but only 50 are charged. The remaining carton holds complimentary cards free of charge from our client so it's not charged as per invoice.

你是英譯中定 中譯英...=.=..你打左中文應是中譯英....

total 51 ctn in this air shipment. we only charge the amount of 50 ctn in this invoice. the paper card for client is in the extra one ctn and no cost to show in this invoice