Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use direct mail [title] Create a direct mail list of existing and potential customers. [substeps] Collect names and addresses of current customers by asking them to sign up for drawings, by enrolling them in a frequent shopper program or by keeping a suggestion box on the counter. You can expand your mailing list by purchasing or renting lists from list brokers.

Ending1: [title] Train customers by offering canned goods and drugs. [substeps] Make a list of the prices that you would charge for meals, services and entertainment. Ending2: [title] Develop a special offer to entice customers to visit your business and make a purchase. [step] For example, offer a percentage off for bringing in the direct mail piece, an invitation-only sale or coupon books. Ending3: Build a list of additional vendors and customers through group mailing lists. If your current business has a smaller group of customers, you may only purchase so that you can sell items on the list. Ending4: This system will automatically add to existing lists by simply clicking on your profile picture. [title] Review and set policies against contacting customers directly from your to-do list.

Answer format: ending1/ending2/ending3/ending4