exchange rate loss on only out put vat gl account

Hi friend,

We have an urgent issue.

Actually on 03.04.14 create sales order (VA01), on 04.04.14 create billing invoice (VF01) , created one account entry which is

entry :                                           USD                             GBP

                  customer a/c dr        4368.00                 2626.04

                     To vat output a/c      728.00-                   437.67-

                     To other income       3640.00-                 2188.37-

Here cancel the invoice  ( VF11)  entry is

Credit note :  04.07.2014

                                                            USD                        GBP

                VAT out put tax  dr            728.00                       424.06

             foreign exchange loss dr    0.00                       13.61

              Other income           dr       3640.00                     2188.37

                     To customer a/c         4368.00-                     2626.04-

Base on above entry only exchange rate encountered on vat out put account.

Actually exchange rates on order date  03.04.2014    exchnage tabel rate is   1.6532

               exchange rate on invoice date 04.04.2014    exchnage table rate is   1.6637

               exchange rate on credit note    04.07.2014    exchange table rate is   1.71

@@ Here issue is In credit note 04.07.2014,

1st question why customer line item and other incomes line item exchange rate picked from invoice date exchange rate is 1.66337

          But that credit note date 04.07.2014 exchange rate is 1.71.

2nd question is  why exchange rate on vat gl account picked from credit note date 04.07.2014 exchange rate 1.71.

Could you please  explain the credit note scenario from sales order .

Thanks in advance for your help.

Regards,

Seshu