Answer:
Return on investment = 21%
Residual Income = $428,960
Step-by-step explanation:
Average operating assets (AOA) = $3,064,000
Controllable margin (CM) = $643,440
Minimum rate of return (MRR) = 7 %
The return on investment is the ratio between the controllable margin (CM) and the average operating assets (AOA):

The residual income is given by:
Residual Income = CM - (MRR × AOA)
