it also depends on whether AJT has THB only or USD only on hand
it is because from AJT (customer's point of view)
1 Because AJT got lots of USD
2 and USD-THB, BOT rate is better than inhouse rate
always see from Company's point of view because you are a finance and accounting person
the gain / loss is very ninoy on transaction but all transactions add up and bank charge cost also this you must understand
if not ask me when I go Thailand in August