How to update Target Value field in ME31K?

Hi,

I need to update target value in contract as total of items multiplied by their quantities. After that I need to pass this value to CEKKO structure to pick up correct release strategy.

I've tried user exit EXIT_SAPLEBND_002, It worked for ME31K but when I go to ME32K and change the values, It is taking true release strategy again but not updating target value field in screen. When I go back and enter again, I see old value there.

Does anyone has any suggestion on this issue?

Thanks.