Rounding issue in Sales order for IDR amount

Hi Team,

We have observed an issue with respect to Sales order , System is rounding to Whole number if the currency is IDR..Please find the below senario..

1St line item A -1kg - Unit Price 23455 IDR extended Price is 23455

2ND LINE iTEM B -1 KG - unit price Is      2345.55 Extended price is 2346 Whic is incorrect should be 2345.55

So order total became 25801 Which is incorrect

VAT 10%  SHOULD BE 2580.1 but VAT became 2580

So total caluclation is rounding off the value and it seems it is happening for IDR amount ,Is there any setup like that,,

Please suggest, Thanks in Advance..