What was the change in the total number of shares purchased between November and December?
{"": {"Total Number of Shares Purchased (1)": "", "Average Price Paid per Share (2)": "", "Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs": "", "Approximate Dollar Value of Shares that May Yet be Purchased Under the Plans or Programs (3)": "(in millions)"}, "October 1, 2019 - October 31, 2019": {"Total Number of Shares Purchased (1)": "\u2014", "Average Price Paid per Share (2)": "$", "Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs": "\u2014", "Approximate Dollar Value of Shares that May Yet be Purchased Under the Plans or Programs (3)": "$"}, "November 1, 2019 - November 30, 2019": {"Total Number of Shares Purchased (1)": 42800.0, "Average Price Paid per Share (2)": 209.74, "Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs": 42800.0, "Approximate Dollar Value of Shares that May Yet be Purchased Under the Plans or Programs (3)": 103.1}, "December 1, 2019 - December 31, 2019": {"Total Number of Shares Purchased (1)": 50854.0, "Average Price Paid per Share (2)": 209.59, "Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs": 50854.0, "Approximate Dollar Value of Shares that May Yet be Purchased Under the Plans or Programs (3)": 92.4}, "Total Fourth Quarter": {"Total Number of Shares Purchased (1)": 93654.0, "Average Price Paid per Share (2)": 209.66, "Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs": 93654.0, "Approximate Dollar Value of Shares that May Yet be Purchased Under the Plans or Programs (3)": 92.4}}
december_total_shares = df["December 1, 2019 - December 31, 2019"]["Total Number of Shares Purchased (1)"]
november_total_shares = df["November 1, 2019 - November 30, 2019"]["Total Number of Shares Purchased (1)"]
answer = december_total_shares - november_total_shares