I need to do payroll, how do I get the total time for my employees?

The best way to get the totals for payroll is to use the Timesheet Totals report.

Select the begin and end date of the time period you want to see. This will provide a list of employees and the total hours they worked for the time period, no math involved. 

However, if you want to see the individual clock in and clock out times for each employee, select the Completed tab on the Timesheet list screen. You can filter by date and employee.