How much are the expenses in 2019?
{"Sales": {"2019": 3941.5, "2018": 3495.5, "% Change": 12.8}, "Net Earnings": {"2019": 74.6, "2018": 101.3, "% Change": -26.4}, "Basic Earnings per Share": {"2019": 0.6, "2018": 0.81, "% Change": -25.9}, "Adjusted Operating Earnings(i)": {"2019": 145.4, "2018": 215.6, "% Change": -32.6}, "Adjusted Earnings per Share(i)": {"2019": 0.68, "2018": 1.22, "% Change": -44.3}}
sales_2019 = df["Sales"]["2019"]
net_earnings_2019 = df["Net Earnings"]["2019"]
answer = sales_2019 - net_earnings_2019