I have a homework assigment to complete.

I have to write a business letter stating that we are very sorry that we failed to send the data/fax modem with
your new computer system. We are sending
it today. What is a good way to begin?
Can you give me some specific suggestions?

It has been called to our attention that.....

To begin your business letter stating the apology for failing to send the data/fax modem with the new computer system, there are a few specific ways you can start. Here are some suggestions:

1. We apologize sincerely for the oversight in failing to include the data/fax modem with your recent computer system purchase.
2. Regrettably, we have discovered that the data/fax modem was not included in the shipment of your new computer system, and we sincerely apologize for this oversight.
3. We would like to express our deepest apologies for the omission of the data/fax modem from your new computer system.

These introductory sentences convey your apology and acknowledge the mistake made by omitting the data/fax modem. You can choose the one that best fits the tone and style you want to convey in your letter. Remember to follow up with an explanation and assurance of sending the data/fax modem promptly to rectify the situation.