Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to write a business letter to customers [title] Use a professional letterhead. [step] The business letter will be a representation of your company. So it should look distinct and high quality.

Ending1: You can use a simple, legible font such as times new roman 12 point or arial 12 point. Also, if the letter requests something specific from you, it should be hand written. Ending2: [title] Define your company's strategic practices. [step] It is important to set business terms and procedures specific to your company, and they should be clearly defined to potential customers. Ending3: It should also lay out your current management style and cash flow. [substeps] Ideally, a business letter should only identify the company, in particular, related to it in straightforward phrases. Ending4: It should also bear your company's logo or brand. [substeps] You can create a letterhead using predesigned color letterhead templates in microsoft word.

Answer format: ending1/ending2/ending3/ending4