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

A) 1.37 × 10^-12
B) 3.04 × 10^-12
C) 2.49 × 10^-12
D) 9.43 × 10^-13
E) 7.01 × 10^-14