When considering the cost of roofing materials, many people take into account just the shingle prices. This is incorrect, as a roof made just of roofing shingles will not work. You also need to consider all the accessories that are included in a complete roof system.
Business letters tend to have both the sender and receiver's address and the date at the top of the page and they begin with a polite salutation, such as dear Mr. and Mrs, followed by a blank line before the body or the content of the letter.
A: While personal letters typically begin with a simple greeting, business or formal letter begin with a collection of information that includes the date, the sender's name and address, possibly the company the sender works for and a formal greeting. All of these should be aligned to the left side of the page.