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 Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu.)

A) 2.74 × 10^-19
B) 9.12 × 10^-28
C) 4.94 × 10^-13
D) 8.20 × 10^-11
E) 2.74 × 10^-16