Answer:
First find the Average fixed cost per papper.
That is,
1. Fixed cost is -
, If sales fall by 20%
Then,
So AFC per papper rises from $1.95 to 2.437
2. The MC will be changes from this 20 % fall is
then
So the marginal cost are changes $1.95 to $2.88
3. Before the changes in cost
So the changes is
The amount changes from $2.40 to $2.88 per paper
Step-by-step explanation: