Dear Woraphong,
Please find below my reply point wise:
1. What happens if I have worked more than 10 hours.
This work is treated as overtime an additional payment in your salary, as per labour law.
2. What happens if I have work on Friday.
We have Friday overtime and that is also considered an additional payment in your salary, as per labour law
Please confirm your acceptance in order to proceed with an official letter.
Regards,