Cross Currency Receipts

If we book a Invoice on 29th Dec for 500 USD @ 131 = 65500 LKR.

On 29th Dec the USD - LKR rate in OB08 is 130 .57895.

Now when I make F-28 on 30th Dec for 30896.62 INR @ 2.12 = 65500.83 LKR

While doing F-28 system propose the open invoices in equivalent INR.

At that time System propose 500 USD value as 30796.92 INR. This is calculated by cross Currency rate which is calculated as 130.57895 / 2.12 = 61.59384. i.e OB08 rate of Invoice Date divided by Transaction rate of receipt entry

As per our requirement system should propose USD value as 30896.62 INR which will be calculated by cross Currency rate which is calculated as 131 / 2.12 = 61.79245. i.e transaction rate of Invoice Date divided by Transaction rate of receipt entry

What is the method by which we can do the settings of calculating cross currency rate for proposed Open Items with reference to Transaction rate of Invoice & not OB08 rate of Invoice date

regards,

Gauri Ranade