My suggestion remains: 1) Your click handler will

selectNewLine

and set the

item

field 2) Add a

postSourcing

handler that listens for the Credit Card Fee being set in the

item

column; when it sees that it will complete the rest of the line values and commit the line By waiting for

postSourcing

before you finish and commit the line, you will see all of `item`'s dependent fields (like the Description) fill out completely before you continue with your calculations