Dear Mr. Underberg:

I am writing to ask why you have not settled our invoice No. E872 for$600, a copy of which is enclosed.

I know that since we began trading you have cleared your accountsregularly on the due dates. That is why I wondered if any problemshave arisen which I might be able to help you with. Please let me knowif I can be of assistance.

Yours sincerely,

Ä£¾ÖÇÏ´Â Underberg¾¾

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