how to control Fx rate in Reporting Ledger

We enabled Reporting ledger in USD for all books.

MRC is not enabled in FA

AP-GL data in RL and FA-GL data in RL are out of sync due to incorrect Fx rates, How can I control Fx rate in RL when journal is copied from PL.

Here is the simple scenario: How do I specify 05FEB as Fx rate in PL and 10FEB as the fx Rate in RL ?

              

Test Case 1   - Within the same period - SGD

Asset creation via mass addition from AP invoice , case #1 - Asset DPIS date is different with AP invoice date and AP invoice GL date