2. Create a sketch showing Crusoe and Hawkins calculating their opportunity costs to determine their comparative advantage. Write a one to two sentence caption explaining why Hawkins has a comparative advantage in gathering coconuts and Crusoe has a comparative advantage in catching fish. Use the terms comparative advantage and opportunity cost in your caption. Crusoe's and Hawkins's Productivity Crusoe's and Hawkins's Crusoe and Hawkins have different opportunity costs for gathering food. A comparison of their opportunity costs shows where each man's comparative advantage lies. .