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.
More Business Letters. Business to business letter concerning change of email/mobile contact details. It's very common for businesses to change contact details like email addresses, mobile phone numbers, and other basic information. It's also very easy to lose contact with business clients, in the process. If you work on the net, or largely through electronic media, this can be a real problem.