Free of charge sample

Hi All,

I have a very urgent requiremnet from my client.

My client is sending free samples to the customers. For them also creating the delivery and billing document. Though these are free samples, but the values of these samples will be shown in the output.And these samples shouldnt be released to accounting.

How can I configure this ..Its very very urgent.

Plz help me out.

Rewards will be there for a helpful answer.

Regards

Ashis