“Fifty percent of cut roses sold in February are sold on Valentine’s Day. On Valentine’s Day in a recent year, the price of a dozen roses jumped from $8.00 to $19.99 at one local store in Chicago. Another bestseller on Valentine’s Day is candy. About 13 percent of the annual sales of candy take place on Valentine’s Day. Yet the price of a box of chocolates increases modestly if at all on this holiday.” Can you explain why this happens?

“Fifty percent of cut roses sold in February are sold on
Valentine’s Day. On Valentine’s Day in a recent year, the price of
a dozen roses jumped from $8.00 to $19.99 at one local store in
Chicago. Another bestseller on Valentine’s Day is candy. About 13
percent of the annual sales of candy take place on Valentine’s Day.
Yet the price of a box of chocolates increases modestly if at all on
this holiday.” Can you explain why this happens?