wda ess benefits customization question

Hi,

I need to make small enhancement on standard ESS benefits app on Credit Plans Step.

The requirement is to ,From the Credit plans step when the user select the required credit plan , I have to capture the Credit amount value for the selected plan and display some where on the screen with some custom text message aling with his credit amount.

Which class or variable I have to use to capture this value show as custom message on the screen. Tried debugging few places but not able to figure out the right spot. any help would be appreicated. attached the screen.

Thanks

Krishna