If Kim can either wash 10 cars or wax 2 cars during a day, and Vince can either wash 17 cars or wax 2 cars during a day, then according to the law of comparative advantage,

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Kim's opportunity cost of waxing a car is 10 cars (10 cars / 2 cars), while Vince's opportunity cost of waxing a car is 17 cars (17 cars / 2 cars). Therefore, Vince's opportunity cost of waxing a car is less than Kim's. If Kim specializes in waxing and Vince specializes in washing, then their total output can be expanded because Kim can wax more cars than Vince can wash, and Vince can wash more cars than Kim can wax.

If Kim Can Either Wash 10 Cars or Wax 2