We need to find the mean salary for the employees:
There are
15 employees with a salary of $21,900, 10
10 employees with a salary of $24,800
3 employees with a salary of $31,200
4 employees with a salary of $37,700
1 employee with a salary of $149, 600
33 total of employees:
The mean formula is given by:

Replacing :

Therefore:

The result is rounded to the nearest hundred.