Sara and Fran produce boards and sails for windsurfing The t
     Sara and Fran produce boards and sails for windsurfing.  The tables show their production possibilities.  Each week. Sara produces 12 boards and 36 sails and Fran produces 30 boards and 10 sails.  Sara\'s opportunity cost of producing a board  is sails.  Fran\'s opportunity cost of producing a board is  sails.  Fran has a comparative advantage in producing boards.  Fran has a comparative advantage in producing sails. 
  
  Solution
a) Sara\'s opportunity cost of producing one board is 1 sails. (6/6)
b) Fran\'s opportunity cost of producing one board is 0.5 sails. (5/10)
c) True
d) False

