Benson Home Maintenance Company earned operating income of $$6,623,400$ on operating assets of $$58,100,000$ during Year $2.$ The Tree Cutting Division earned $$1,169,480$ on operating assets of $$6,920,000.$ Benson has offered the Tree Cutting Division $$2,150,000$ of additional operating assets. The manager of the Tree Cutting Division believes he could use the additional assets to generate operating income amounting to $$410,650.$ Benson has a desired return on investment $($ROI$)$ of $9\mathrm{.}40$ percent.

Required

a$.$ Calculate the return on investment for Benson, the Tree Cutting Division, and the additional investment opportunity.

b$.$ Calculate the residual income for Benson, the Tree Cutting Division, and the additional investment opportunity.