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.
Email is widely used as a form of business communication and overall it is a highly effective communication tool. Email is inexpensive, only requiring an Internet connection that is generally already present in the business. Although a printout of emails is possible, emails often stay as soft copies because archiving and retrieving email communications is easy to do.