8. Brett has almond orchards, but he is sick of almonds and prefers to eat walnuts instead. The owner of the walnut orchard next door has offered to swap this year's crop with him. Assume he produces 1000 tons of almonds and his neighbor produces 800 tons of walnuts. If the market price of almonds is $100 per ton and the market price of walnuts is $110 per ton:

a. Should he make the exchange?

b. Does it matter whether he prefers almonds or walnuts? Why or why not?