Pretty amusing and cute solution. I sorta found it by accident. I tried ************************************************************************************************************************************************************************ Funny idea. :)
Finally came back to this today months later with new found powers and immediately saw how this audit could be done. Hilariously clever solution. Felt so nice to finally get this one.
As an accountant myself I know how to deal with auditors pretty well and got this in two tries. I do appreciate how hard this could be to untangle though.