D365 Finance & Operations and Dynamics AX Forum

Hello everyone, I would appreciate any help/advice with this. I have seen some forum posts on this very topic, but it seems they are not providing me with the solution I am looking for. Mainly this link: Dynamics 2012 r3 CU13 - Add automatic late fee to past due orders | D365 Finance & Operations and Dynamics AX Forum (axug.com) 

This seems like the closest to what I am looking for. Create an interest charge and then set up a batch to charge this interest automatically. The issue I am seeing with this is the charge is set to reoccur, not be a one-time charge. (Highlighed below) Also, the ask is for the fee to be based on the invoice amount. If it is <= $1000, then the fee is fixed at $10. If the invoice amount is >= $1001, then the fee is 1% of total invoice amount. I don't see where this is possible in the current set up. 

I am looking for possible alternative solutions or just a flat out "it's not possible" in the current set-up I am in. Any help is appreciated, thanks!