I will describe the answers from A.I Network.
【 Management accounting on Handling 】
During the period, about recorded to account for
sales and purchases in the monthly fixed rate,
there is no problem.
When using a fixed rate, using a fixed rate in both
the sales and purchases,
It is common to converted into baht.
Sales and purchases recommend from the point of view
of consistency of accounting treatment that are
translated in the same fixed rate.
【 Handling on Accounting Standards (handling
in the annual accounts)】
On accounting standards, sales and purchases, in principle,
at a rate of Bank of Thailand trading day (BOT) must be
converted.
Therefore, when the year-end financial results at your were
translated at the BOT rates at the dates of the transactions,
sales and purchases during the period and calculating the
difference between the amount
of money that was converted at a fixed rate.
It means to fix if the difference is deemed significant by
the auditor.
Accounts receivable and accounts payable of the end of the
year, you must account for at the exchange rate of the end
of the fiscal year.
If the foreign exchange gain occurs, is recorded in
"other income", when the foreign exchange loss occurs,
it will be recorded in "selling, general and administrative
expenses".
※ Sanko Thai will the monthly closing
【 Tax treatment 】
It is possible to convert the sales and purchases in the
commercial banks of fixed-rate, but the value after conversion
you need to make sure whether it is a market price.
If selling price is lower than the market price, etc.
there is a risk that is regarded as the problem of transfer
pricing.
Because it is determined by the Thai baht, even if the profit
is generated in the yen-denominated. it is lost in the
baht-denominated ,there is problem.