As per we discussion with CPF-Lamphun about payment.
Payment have 2 case.
1. Normally : billing not over 19 every month and will pay next month.
2. In case : (budget on hand or big project will payment 3 period)
In this case we can billing not over 19 every month and will pay next month, (Transfer account.)
Next time, when we contact CPF again they are payment 3 period.
1. if have order their will pay 20% after 2 months
2. 50% installation.
3. 30% after installation.