The Twelve Days of Christmas

…shopping online raises the price for the gifts by nearly $9,500.

Overall the "nine ladies dancing" cost no more than last year, but the "eight maids a-milking" are governed by the increase in the federal minimum wage.  Here is much more information about the gifts and what they cost.  Perhaps for environmental reasons, the inflationary pressure in the index comes from the swans:

Swans, which vary widely in price because of their scarcity, have
caused big swings in the index. The gift package this year would shoot
up to $21,080.10 if the swans were included because the going price for
the seven is $5,600. That is a 33 percent increase, or $1,400, for the
swans compared with the price last year.