Answer:
If you are a waiter or a server then at the beginning of your career you should gain expertise on carrying trays properly. Generally trays are carried on the left shoulder. For hygiene issue, you should try to keep away the tray from your neck or mouth. Trays can be of various design, size and shapes. In restaurant 27 inch to 30 inch oval trays are used frequently for carrying foods. Cocktail trays are 15 inch which are used for serving beverage items.
Hope it helps you.
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-Kenllanda8
