Pull Budget Amounts for Multiple Accounts

Hello, I'm trying to pull budget amounts for a few accounts from a database and would like to avoid using the GL function, if possible. The reason is that I have strings of accounts the budgeted numbers of which need to be collapsed to one cell, so I figured an NL function would work better. Can anyone provide guidance if that is at all possible? If so, what is the exact synthax for the NL function?

Thank you.