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.
Business documents range from brief email messages to complex legal agreements, and my be drafted internally or by outside professionals. A company uses documents to communicate, transact business and analyze its productivity. Business documents range from brief email messages to complex legal agreements. Some documents are prepared by employees and business owners, while others are drafted by professionals from outside of the company, such as accountants and lawyers.