Hi all-
I'm trying to automatically create budget codes after a new expense has been entered via input grid on a UX page. Overall, I'm having trouble generating a numerical sequence after the other parts of my concatenated code. I've so far been using RANK(1, DESCENDING, SEQUENTIAL) but having it skip by 15 every line.

Also, after these expenses are sent through, how can I add on to the last number instead of referencing the same sequence again and again?
The help is much appreciated, thank you!