How to post exchange rate to separate G/L at MIRO

Dear all,

While doing GRN  100 units for import PO the exchange rate is Rs.50 for $.

The accounting entry is

Stock A/C Dr 100*50               5000

Provision A/c Cr                      5000

at the time of MIRO the exchange rate is Rs.55 for $.

The required entry should be

Provision a/c Dr  100*50                    5000

exchange fluctuation a/c Dr 100*5        500

Vendor a/c Cr                                             5500

Regards,

Shivaji