I only have to pay at a minimum the past due balance of $200 by March 4th in order to avoid interruption of my cable/Internet/land phone services. Of course, paying the full due amount of $643 would be the most ideal.
However, if I don't pay the past due by that date & my service gets disconnected, I would have to pay out the full $643 bill, PLUS the total amount for regular services for the subsequent month ($440)...