Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to prepare a customer invoice [title] Write or type your company's contact information on a sheet of paper, spreadsheet or other electronic record keeping system. [step] Remember to include an email address and phone number where they can contact you with questions. [title] Create an original customer invoice number using letters, numbers or both.

Ending1: [step] The format of your invoice must be legible. A template would be sufficient, but a business invoice number and a telephone number can work too, and personal information such as insurance information must be included. Ending2: [title] Take copies of your customer invoice numbers. [step] It is recommended that you print or hand-write them, rather than keep them paper-by-paper, in order to make them easier to trace later on. Ending3: [step] Put it in a word document that shows the date and month, the time it was received and the brand name. [substeps] Place the following addresses on the invoice: \ us office or. Ending4: [step] A customer invoice number can be as simple " job-001 " or more complex, such as " smith-job-001. " the second example is useful for repeat customers because it includes their last name along with a job number.

Answer format: ending1/ending2/ending3/ending4