You must pay for the 750 baht/month, 3 members and 300 baht for a 2 months surplus cash to pay money as 600 total 1350 and will restart after the installation.
You have to pay 750 Baht per month 3 members and the more than 2, 300 Baht per month for 600 as well as a total amount to be paid for 1350 and will start counting after installation.