How to calculate the basic salary commission of hotel room sister-in-law

Basic salary: 2500 yuan/month, commission method: except basement 12 room, commission is paid according to the room cleaned. The hotel housekeeper is the person in charge of cleaning the room. Basic salary: 2500 yuan/month, commission method: except basement 12 room, commission is paid according to the room cleaned. Requirements: under 45 years old, in good health.