How to write a parsing rule for the text FXAMT=602,56

Summary:

Importing a BAI2 bank statement into Oracle Cash Management. Bank is giving the original currency amount as FXAMT=602,56 in the additional information field. We want the amount as 602.56 in the Original amount field under Foreign Currency Information.

I wrote a parsing rule as FXAMT=(NNN.NN) but it is not working this way. Can anyone suggest.

Thanks you in advance!

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