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How to order a subway sandwich
Make all decisions (the type of bread, meat, vegetables, and cheese) before you approach the counter.
Do not wait until you're asked to decide. If you're unsure, allow others to order first.

-Ask any questions you have before beginning the order process. This can include any questions about vegetarian-friendly sandwiches, general meals, prices, etc.
-Many subway stops offer a free subway sandwich anytime a new person arrives. If you can wait for that person to leave and again pass time, wait a few minutes until everyone stops.
-This may save you time in negotiating on the fare, paying for the sandwich, and dealing with impatient waiting at the cashier. Approach the window when a cashier approaches.
-Guide others to the vending machine. Walk away smiling, and if you're bothered, give your customers a chance to pick their own bread first.
Answer:
Ask any questions you have before beginning the order process. This can include any questions about vegetarian-friendly sandwiches, general meals, prices, etc.