Groovy script for remaining amount to be billed

Summary:

Content (please ensure you mask any confidential information):

Hi all,

We need to derive the total remaining amount to be billed of a subscription and send this information to AR. 

Do you have an example of a groovy script which will send to AR the following information: product line level amount - amount of the lines interfaced to AR before system date? 

Thank you.

Andreea

Version (include the version you are using, if applicable):

24A

Code Snippet (add any code snippets that support your topic, if applicable):