Question: oh probably be another twelve years
Another twelve years will be the amount of time I hope for.

Answer: it is not possible to tell

Question: This assumption seems likely to result in an overstatement of the domestic postage that would be collected on inbound mail.
The domestic postage that would be collected would be overstated because of this assumption.

Answer: yes

Question: (Just because they carry it, of course, doesn't mean they actually play it five times a week.)
They play it three times a week.

Answer:
it is not possible to tell