A certain unit organized employees to travel to the scenic spot, and *** paid the travel fee to Spring and Autumn Travel Agency not less than 25,000 yuan. How many employees did the unit have this tim

A certain unit organized employees to travel to the scenic spot, and *** paid the travel fee to Spring and Autumn Travel Agency not less than 25,000 yuan. How many employees did the unit have this time ***?

Suppose the payment fee is P and the total number of people is m,

{1000-(m-25)*20}*m>=25000

m> =25

1000-(m-25)*20>=700

Solution: 25<=m<=40