Foreign currency valaution

Hi Experts,

We did some validation on FI documents generated by Foreign Currency Valuation for this month, we think Exch.Rate at 08/31 should be taken into account but acctually the valuation amount was calculated using Exch.Rate at 07/31 and aslo let me know table to view this exchange rate posted in docuemnt

Please help me.

Thanks,

Vani