What is the change in Cost, Insurance and Freight (CIF) value of imports from FY 2018 to FY 2019?
{"a. Foreign exchange earnings": {"FY 2019": 119499, "FY 2018": 92258}, "b. CIF Value of imports": {"FY 2019": 447, "FY 2018": 768}, "c.Expenditure in foreign currency": {"FY 2019": 49336, "FY 2018": 33014}}
cif_2018 = df["b. CIF Value of imports"]["FY 2018"]
cif_2019 = df["b. CIF Value of imports"]["FY 2019"]
answer = cif_2018 - cif_2019