In which market type does the firm face the most inelastic demand curve?

Harry owns a barber shop and charges $6 per haircut. By hiring one barber at $10 per hour, the shop can provide 24 haircuts per 8-hour day. By hiring a second barber at the same wage rate, the shop can now provide a total of 42 haircuts per day. The MP of the second barber is

A. 42 haircuts. B. $240. C. 18 haircuts. D. $108.

If you are traveling in China and you purchase a meal that costs 140 yuan and the current exchange rate is 7 yuan to the dollar, then the price of the meal in U.S. currency is

A. $200. B. $20. C. $10. D. $2.