What is the amount of expenses incurred for FY 2019?
{"Revenue": {"FY 2019": 146463.0, "% Growth": 19.0, "FY 2018": 123104.0}, "Earnings before interest, tax, depreciation and amortization (before other income)": {"FY 2019": 39506.0, "% Growth": 21.5, "FY 2018": 32516.0}, "Profit Before Tax (PBT)": {"FY 2019": 41563.0, "% Growth": 21.9, "FY 2018": 34092.0}, "Profit after tax attributable to shareholders of the Company": {"FY 2019": 31472.0, "% Growth": 21.9, "FY 2018": 25826.0}, "Earnings per share (in `)": {"FY 2019": 83.05, "% Growth": 23.8, "FY 2018": 67.1}}
revenue_2019 = df["Revenue"]["FY 2019"]
earnings_2019 = df["Earnings before interest, tax, depreciation and amortization (before other income)"]["FY 2019"]
answer = revenue_2019 - earnings_2019