Exchange Rate mismatching

Hello,

We are facing an exchange rate mismatching between Income Statement and Specification Accounts.

Income Statement accounts are submitted monthly and the exchange rate applied on it is the periodic exchange rate.

On the other hand Specification Accounts are submitted quarterly and the exchange rate applied on it is the periodic cumulated average exchange rate.

The condition between these two kinds of accounts is that after the third month of data submission both Income Statement and Specification Accounts must match, but this is not the case since we are using different exchange rates and data is submitted with a different frequency.

We would like to know what are the options BCS provides for matching these two accounts at the end of every quarter.

Thanks in advance.

Diego