Templates are the format to be followed in a resume. You have to just download this format and fill the corresponding details in each section. The sections are arranged in the proper order of importance. It also provides an appropriate format for your resume.
It necessarily describes the kind of services offered and the price agreed for providing them. Usually, companies include their logo in the customer invoice template and, depending on the nature of business, they may mention the payment terms and the breakdown of goods or services offered.