what one says is very often influenced largely by one's position, and it is generally wise to indicate this.
Whatever the situation may be the tone of a business letter should always be courteous. "The customer is always right" is a phrase pretty hard to live up to in many instances, but it is always wise to do so. No matter how sarcastic and scathing a letter may be, even if it approach the limit of insult, there is everything to be gained by keeping one's self-possession, and exhibiting self-control. The most effective reply to such a letter is brevity, dignity, and courtesy. The man who will not be thrown off his guard and descend to discourtesy will ultimately win.
A good many people feel that the grammatical, carefully phrased letter with well-constructed sentences and correctly spelled words is essential only when doing business with the cultivated. I listened not long ago to a young college graduate of a middle west institution who was trying to impress me with the practical character of a set of books of which he was trying to dispose. He made all sorts of crude errors, his pronouns seldom revealed any