If sales fall by 20 percent from 1,000,000 papers per month to 800,000 papers per month, what happens to the afc per paper?

You are to receive five gold coins from your great uncle as an incentive to study hard. the coins were originally purchased in 1982. your great uncle will deliver the coins the week after finals (assuming your grades are "acceptable"). the amount your great uncle paid for the coins is a(n): indirect cost.overhead cost.opportunity cost.sunk cost.