please answer

use the graph below to answer the following question $4.50 4.00 3.50 S 3.00 2.50 Price per dozen bagels 2.00 1.50 1.00 D 0.50 0 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Quantity (thousands of dozens per month) At a price of $1.50 per dozen, how big of a shortage is there