All timesheet costs details of the employee will be recorded in the Timesheet Cost field. If you want to take a look at the history of the timesheet cost, click on the corresponding option under the Employee History tab.
As you can see in the screenshot above, the updated date and value of the timesheet can be seen in the Updated On and Current Cost fields respectively.
Using the Employee History module, it is easy to keep a record of the changes in the Job Position, Salary, Contract, and Timesheet Costs of an employee.