RM Bridge - additional torsion and shear reinforcement

Hi. I have question regarding additional reinforcement from torsion and shear loads in RM Bridge software.

After calculating torsion and shear effect, and getting required additional longitudinal reinforcement due to these loads, do we add up these two additional reinforcement and add it to the bending required reinforcement? Or do we choose the biggest one of these three?

Regards

Ivana