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.
Well, first itâs important to remember that memos are usually meant for use only within the office and are sent through the internal mail system of the company. Anything that needs sending externally, to clients or suppliers etc, should be written in the more formal format of a letter. Secondly, they should be used when the information needs to be put in writing, not as a way to avoid speaking with people face-to-face. And lastly, they should be clear and brief.