It's ok for a star-rated hotel to divide the waiters into eight grades, but it seems a bit too much for an ordinary hotel.

Grading: trainee waiters -> C-class waiter -> Class b waiter -> A-level waiter -> Junior trainer->; Intermediate trainer -> Senior trainer -> Reserve managers.

Promotion criteria: new employees are rated as trainee waiters, and they are rated as C-class waiters after working for one month; Class C waiters have no faults and bad attendance in that month, and they can be rated as Class B waiters if they work hard and seriously. B-class waiters are rated as A-class waiters who have no faults and bad attendance in that month, work hard and seriously, and can order independently and without errors. The A-level waiter has no fault or bad attendance in that month, works hard and seriously, and has strong sales promotion ability. The average unit price of the customers ordered exceeds 81 yuan/person (the standard is self-determined) ............