All these format types are appropriate for certain types of content. It is important to note that although the prepared templates make the writing easier, the decision on which template to use is still up to the writer. If you are having problems choosing which one fits your topic, you can browse through past articles and see how each template has been used before.
How can you expect your customers to take your business seriously if your invoices do not appear professional? An invoice is the last impression you give to your customer. Why not close the deal with an invoice template that is professional, free, and easy to use? A professional invoice is critical to your companys credibility, not only so your customers pay you promptly, but also so they call you again for future business.