Final answer:
If an MPC (Master Production Control) is refused, it would be inappropriate to enter a date into the computer system. Instead, the system can be updated with a note or comment indicating the refusal and the reason.
Step-by-step explanation:
If an MPC (Master Production Control) is refused, it means that a date cannot be set for the production of certain goods. In this case, it would be inappropriate to enter a date into the computer system since the production cannot proceed. Instead, the system can be updated with a note or comment indicating that the MPC was refused and the reason for the refusal.