Answer:
A) Tony's opportunity cost for spending 10 hours planting seeds is $250, since that is the amount he could earn be teaching guitar lessons.
B) Tony's accountant will calculate the cost of planting seeds at $130, since it includes only the cost of the seeds
C) Tony's accounting profit is $170 (= $300 - $130). Revenue from selling wheat - accounting cost of planting wheat seeds.
D) Tony's economic loss is $80 [= $300 - ($130 + $250)]. Economic profit or loss is calculated with the formula: economic profit = total revenue - (accounting costs + opportunity costs)