I wonder if that is the bank transfer fee on your end to recieve the transfer.
I was advised in writing that any bank transfer fee would be taken care of by your hotel.
I sent you THB 66,600. The bank transfer fee on my side was over and above this and I've paid it.
I feel as thought I have paid in full.
I'll forward you a copy of the invoice/booking confirmation that mentions your hotel paying any bank transfer fees incurred on
your end.