a$.$ What is the Erie store$$s expected ROI for the coming year if it does not carry Hoffman$$s merchandise?

b$.$ What is the store$$s expected ROI if the manager invests in Hoffman$$s inventory and carries the audio line?

c$.$ What would the store$$s expected ROI be if the manager elected to take the floor plan option?

d$.$ Would the manager prefer $($a$),($b$),$ or $($c$)$ if evaluated using ROI?

e$-1.$ What is Erie store$$s expected residual income for the coming year if it does not carry Hoffman$$s merchandise?

e$-2.$ What is the store's expected residual income if the manager invests in Hoffman$$s inventory and carries the audio line?

e$-3.$ What would the store's expected residual income be if the manager elected to take the floor plan option?

e$-4.$ Would the manager prefer $($a$),($b$),$ or $($c$)$ if evaluated using residual income?