To bill Customer based on Timesheet, check "Is Billable" in the Timesheet created against Project and Task. To learn more about billing Customer from Timesheet, click [here](/docs/user/manual/en/projects/timesheet/sales-invoice-from-timesheet.html).
User can also make invoice against timesheet by selecting the project on the invoice. System will fetch the records from the timesheet based on selected project, for mode detail check below video
When creating Timesheet, Employee will have to select an Activity Type. For each Activity Type, you can create an Activity Cost master. In the Activity Cost, Billing Rate and Costing rate is defined for each Employee.
In the Timesheet, costing will be done based on Activity Cost multiplied with number of hours. Based the Timesheet Cost, total costing will be doen for the Task and Project as well.
