The Mass of a Proton Is 1

The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the binding energy (in J) of a nucleus? (The mass of a cobalt- 60 nucleus is 59.9338 amu.)

A) 8.206 × 10^{- 11}
B) 9.117 × 10^{- 28}
C) 4.940 × 10^{- 13}
D) 2.735 × 10^{- 16}
E) 2.735 × 10^{- 19}