Answer:
Division A  has the  residual income of $6,960. Hence, it is the top performer
Explanation:
Using the residual income performance metric, the division with the highest residual would be considered the top performer.
Residual income = Net operating income - (cost of capital Ă— Operating assets)
Division A= 12,000 - (12%Ă— 42,000)= 6960
Division B = 10,000 - (12% Ă— 45,000)= 4600
Division C = 16,000 - (12% Ă— 80,000)= 6400
Division A  has the  residual income of $6,960. Hence, it is the top performer