Sales at the University Bookstore Month L Sales $500,000 2 3 4 $220,000 $1,190,000 $420,000 A (420,000, 1), (1,190,000, 2), (220,000, 3), (500,000, 4) B) (500,000, 1), (220,000, 2), (1,190,000, 3), (420,000, 4) (1,500,000), (2, 220,000), (3, 1,190,000). (4. 420,000) D) (1,220,000), (2, 500,000), (3, 420,000), (4, 1.190,000)​