Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to improve energy efficiency in a restaurant [title] Contact your local power or natural gas provider and have them conduct an energy audit, analysis or survey. [step] This can pinpoint specific areas for improvement that you can implement over time. [title] Regularly maintain the equipment you have and follow through with speedy repairs when it breaks down.

Ending1: [step] There's no doubt that your equipment will be subjected to the everyday wear-and-tear. Clean coils and replace air filters regularly for smooth operations. Ending2: [title] Do not spend money on condiments, soups, saltrays, lozenges, creamers, sauces, cookies, muffins, breads, flour, pies or powerheads, sugar and salt. [step] These will be a source of additional energy. Ending3: [title] Get a shift manager for your local gas company to update the equipment every 4 to 6 months. [title] Try and get quality data so that updates will be timely. Ending4: [step] They will give you extra training to complete every time you need it. Be sure that the power station you use is at its most efficient.

Answer format: ending1/ending2/ending3/ending4