4. Opportunity cost and production possibilities Paolo is a skilled toy maker who is able to produce both boats and puzzles . He has 8 hours a day to produce toys . The following table shows the daily output resulting from various possible combinations of his time . Hours Producing Produced Choice ( Boats ) ( Puzzles ) ( Boats ) (Puzzles ) A 8 0 4 B 8 13 D 2 6 15 m 8 O 16 On the following graph , use the blue points (circle symbol ) to plot Paolo's initial production possibilities frontier (PPF )