I know the feeling
This seems about right:
Balance: IIf(((([MonthlyRent]+[Prev Balance]-[Rent Paid])>0) Or ([Date Rent Paid] Not Between DateSerial(Year(Date()),Month(Date()),1) And DateSerial(Year(Date()),Month(Date()),5))),([Prev Balance]+[MonthlyRent]+[Late Fee]-[Rent Paid]),([Prev...