Possible Clues:

• Money charged for delivery after a certain time
• Mailing expense
• Stamp on it for this
• Announce time and cost of delivery
• After a time it's for the male, by the sound of it
• Charge after a mount for example
• Delivery cost in subsequent period?
• The cost of letters after a time
• It's got stamped on it how old the Pole is
• Amount paid to mail