Can you disclose in-store marketing salaries to help employ them get a fair salary?

From my research, I noticed that the service or the employees that exist in marketing for the year 2021-04-01 are remarkable from the communicating director with a salary of € 6,667 to the marketing assistant € 2,542 therefore the salary of the in-store marketing increases the managerial level takes the department manager the level most easily accessible by a salesperson who works in mass distribution the net remuneration can go up to 4,360 € monthly this of course depending on the size of the company with the responsibility the salary increases. hope I answered the question thanks.