Is there any solution already to use and bill Timesheets based on different prices per hour?

For example recorded timesheet hours between 9am and 5pm on week days is 100 euro/h and outside this timeframe it's 200 euro/h.

I know easiest way would be to select a task outside or inside regular hours, but very often a task is started at 4pm for example and continues till 7pm.

We also have a client where the team manager registers the timesheets (through an external app that is connected to Odoo) for the employees with him. The employees are having low education level and are not capable to register hours themselves. So, there is only 1 task to register the timesheets in. The registered working hours have to be billed according to the education/experience/... level of the employee.

So, there are lots of timesheet lines for all the employees been working on the task, but the billing of the timesheet lines is not identical for all lines. 

How can we implement this in Odoo 18?

It seems that there was a solution (or something that looks like a solution) in Odoo 13:

https://www.odoo.com/documentation/13.0/applications/services/project/record_and_invoice/invoice_time.html

Dear Ray,

Thanks for the answer. This is not the solution i hoped for, but it is a nice work around. I have 2 remarks

1) Why not using the timesheet cost on employee HR settings instead of having it to input again. 

2) This way of working is rather complex for field technicians they have to know exactly on what task they have to register the hours. On top if that we are using 2 tasks for the same activity.  It would be better to just use the timesheet cost and make it possible for all  employees to book time on the same task. Maybe a nice feature for v15 or v14...

Thanks anyway