A company plans a four-year project which will be financed by either an operating lease or a bank loan.

B. Tax relief on lease payments have not been lagged correctly – ERROR

Tax is paid one year after the year to which it relates. Lease rentals in each project year (1–4) give tax relief in years 2–5. In the appraisal, the tax relief on lease payments is shown too early (years 1–4), so the lag is wrong.

C. Using the 10% discount rate is incorrect – ERROR

A lease-versus-buy comparison should discount finance cash flows at the after-tax cost of borrowing, not the nominal interest rate. Here, the after-tax cost of debt is:

10%×(1−0.20)=8%10\% \times (1 - 0.20) = 8\%10%×(1−0.20)=8%

So using 10% is an error.

F. The salvage value has been included within the lease option – ERROR

Under an operating lease the asset is not owned by the lessee, so it does not receive the $100,000 residual value. Including a salvage value in the leasing case is therefore incorrect.

Options D and E are not errors (operating cash flows and specific loan repayments are rightly excluded), and the timing of the lease payments themselves (A) is correct.