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 one of the single most important means of business communication on the planet. In fact, having an efficient, reliable email client can mean the difference between working and not working. As you might expect, there are numerous email clients for the Android platform. Some of them are quite good, but others are worthless.