an office building is rented at $25psf, gross with operating expenses at $10psf. net income therefore is $15psf. if the purchase price is $250psf the going in cash-on-cash return is 6.0%. prepare a sensitivity analysis showing the cash-on-cash returns by changing the rental rate and operating expenses. 1. prepare the analysis showing variations $1psf changes in both variable for two adjustments in each direction (increased or decreased)