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.
The differences between emails and letters is that, emails are send electronically and arrives faster to the person that you are sending it too, while in the other hand letters takes a little bit longer to arrives to the person and can be lost from the mailing company especially whens sending it overseas also it cost money.
The greeting in a business letter always ends in a colon. (You know you are in trouble if you get a letter from a boyfriend or girlfriend and the greeting ends in a colon--it is not going to be friendly.) 4. The Body. The body is written as text. A business letter is never hand written. Depending on the letter style you choose, paragraphs may be indented. Regardless of format, skip a line between paragraphs.