How to calculate the number of people and days in the hotel?

The number and days of hotels are calculated as follows.

1. number of people: refers to the total number of people staying in the hotel, and the calculation method is the total number of people staying in the hotel. For example, a hotel receives 100 guests a day, of which 50 people stay for one night and 50 people stay for two nights, then the number of people staying in the hotel is 150.

2. Person days: refers to the sum of the product of the number of people staying in the hotel and the number of days staying in the hotel. The calculation method is: the product sum of the number of people staying in the hotel and the number of days staying in the hotel.