How much more in Director compensation did Peter A. Feld have over Dale L. Fuller?
{"Susan P. Barsamian(5)": {"Fees earned or paid in cash ($) (1)(2)": 3383, "Stock Awards ($)(3)(4)": 73210, "Total ($)": 76593}, "Frank E. Dangeard": {"Fees earned or paid in cash ($) (1)(2)": 85018, "Stock Awards ($)(3)(4)": 274982, "Total ($)": 360000}, "Peter A. Feld(7)": {"Fees earned or paid in cash ($) (1)(2)": 16071, "Stock Awards ($)(3)(4)": 174108, "Total ($)": 190179}, "Dale L. Fuller(7)": {"Fees earned or paid in cash ($) (1)(2)": 34821, "Stock Awards ($)(3)(4)": 147321, "Total ($)": 182142}, "Kenneth Y. Hao": {"Fees earned or paid in cash ($) (1)(2)": 21, "Stock Awards ($)(3)(4)": 324979, "Total ($)": 325000}, "Richard S. Hill(5)": {"Fees earned or paid in cash ($) (1)(2)": 15772, "Stock Awards ($)(3)(4)": 61948, "Total ($)": 77720}, "David W. Humphrey": {"Fees earned or paid in cash ($) (1)(2)": 21, "Stock Awards ($)(3)(4)": 324979, "Total ($)": 325000}, "Geraldine B. Laybourne(10)": {"Fees earned or paid in cash ($) (1)(2)": 80018, "Stock Awards ($)(3)(4)": 274982, "Total ($)": 355000}, "David L. Mahoney": {"Fees earned or paid in cash ($) (1)(2)": 105024, "Stock Awards ($)(3)(4)": 274976, "Total ($)": 380000}, "Robert S. Miller(10)(11)": {"Fees earned or paid in cash ($) (1)(2)": 120639, "Stock Awards ($)(3)(4)": 124635, "Total ($)": 245274}, "Anita M. Sands": {"Fees earned or paid in cash ($) (1)(2)": 70018, "Stock Awards ($)(3)(4)": 274982, "Total ($)": 345000}, "Daniel H. Schulman": {"Fees earned or paid in cash ($) (1)(2)": 195018, "Stock Awards ($)(3)(4)": 274982, "Total ($)": 470000}, "V. Paul Unruh": {"Fees earned or paid in cash ($) (1)(2)": 95018, "Stock Awards ($)(3)(4)": 274982, "Total ($)": 370000}, "Suzanne M. Vautrinot": {"Fees earned or paid in cash ($) (1)(2)": 70018, "Stock Awards ($)(3)(4)": 274982, "Total ($)": 345000}}
peter_feld = df["Peter A. Feld(7)"]["Total ($)"]
dale_fuller = df["Dale L. Fuller(7)"]["Total ($)"]
answer = peter_feld - dale_fuller