Hotel quantity calculation

In the data you gave, the number of people at the end of the month should be 323=288+35, that is to say, when the system automatically calculates, the resigned personnel are not considered, but only the on-the-job personnel are considered. In fact, the actual number of people at the end of the month should be the beginning of the month plus the net increase, that is, 288+(35-25)=298. If you count these 25 people, it doesn't match the number of people in the system.

Counting the number of people means that you need to know what data you want, net increase or decrease, or average data.