How To Write A Letter Of Repair Cost . This letter is written to the owner of what should be repaired. Communicate the change to your team first. FREE 82+ Sample Letter Templates in PDF MS Word from www.sampletemplates.com A good letter should have a brief salutation, the statement of your intent to increase your rates by a specific amount starting on a specified date. The letter may be adapted in a number of ways. This letter is written to the owner of what should be repaired.