Answer:
Marginal opportunity cost is the number of units of good 1 that are sacrificed for producing an additional unit of other good.
A) If we increase the production of butter from 1 to 2 then Guns production decreases from 36 to 26. Thus opportunity cost of second unit of butter is 10 guns.
B) Total opportunity cost of 2nd unit of butter = 18 guns
C) marginal opportunity cost of producing the third unit of butter = 12 Guns
D) Total opportunity cost of third unit of butter = 30 Guns
