sap treasury - other flows

Hi,

We have the scenario -  transaction charges will be deducted on the basis of percentage

For example: Transaction charges

for example - INR 1,00,00,000/- @ 1000/- (fixed amount)

When i enter the INR 1,00,00,000/- transaction charges INR 1000/- will be updated automatically in the other flows tab and Payment details.

Is it possible.

please advice me how to do it.

with regards

raju