Below is sample letter reply to enquiry about discount rate :
Your Name
Company Name
Street Address
City, ST ZIP Code
Date
Recipient Name
Title
Organization Name
Street Address
City, ST ZIP Code
Dear Recipient Name:
We apologize for giving you the wrong discount rate. Our new clerk confused you with another company in California with a similar name to yours which gets 20% discount from us.
We enclose a new invoice for you with the usual discount of 25%.
Thank you.
Sincerely,
Your Name