Answer:
Residual income = Â $666,270
Explanation:
The residual income is the amount left after the opportunity cost of capital deducted from the net operating income
Operating income=Contribution margin -Fixed cost
Operating income= 1,050,000 - 325,500= $724,500
Residual income = Net income - (cost of capital × capital invested)
=$724,500  - (18% × 323,500)= 666270
Residual income = Â $666,270