Answer: 4,8
Explanation:
Without trade Jake consumes 20 pounds of green beans and 80 pounds of corn
Jane consumes 40 pounds of green beans and 40 pounds of corn.
Terms of trade are 1 pound of green beans for 3 pounds of corn.
Jake sells Jane 72 pounds of corn in exchange for [tex]\frac{72}{3} = 24[/tex] pounds of green beans.
Thus, Jane gains [tex]24 - 20 = 40[/tex] green beans and [tex]80-72 = 8[/tex] pounds of corn.