What is the difference between Indraneel Dev and Stacey W. Goff's total grant values?
{"Current Executives: -- Jeffrey K. Storey(5)": {"No. of Shares(1)(3)": 358884, "Grant Value(1)": 5040000, "No. of Shares(2)(3)": 538328, "Grant Value(4)": 7560000, "Total Grant Value(4)": 12600000}, "Current Executives: -- Indraneel Dev": {"No. of Shares(1)(3)": 76904, "Grant Value(1)": 1080000, "No. of Shares(2)(3)": 115356, "Grant Value(4)": 1620000, "Total Grant Value(4)": 2700000}, "Current Executives: -- Stacey W. Goff": {"No. of Shares(1)(3)": 56966, "Grant Value(1)": 800000, "No. of Shares(2)(3)": 85449, "Grant Value(4)": 1200000, "Total Grant Value(4)": 2000000}, "Current Executives: -- Scott A. Trezise": {"No. of Shares(1)(3)": 22786, "Grant Value(1)": 320000, "No. of Shares(2)(3)": 34180, "Grant Value(4)": 480000, "Total Grant Value(4)": 800000}, "Current Executives: -- Shaun. C. Andrews": {"No. of Shares(1)(3)": 21362, "Grant Value(1)": 300000, "No. of Shares(2)(3)": 32043, "Grant Value(4)": 450000, "Total Grant Value(4)": 750000}}
indraneel_dev_grant = df["Current Executives: -- Indraneel Dev"]["Total Grant Value(4)"]
stacey_goff_grant = df["Current Executives: -- Stacey W. Goff"]["Total Grant Value(4)"]
answer = indraneel_dev_grant - stacey_goff_grant