Purchase of Computers. BCB Company plans to buy ten new computers at a cost of $2,000 each. The old computers can be disposed of for a total of 5500 for all of them. The new computers are expected to last five years, with no salvage value at the end of that time. Because the new computers will increase efficiency and reduce costs, the incremental net cash inflows resulting from this investment are projected at a total of $6.000 per year. The firm's cost of capital is 14 percent. Required: Determine the following:

a. Payback period.

b. Unadjusted rate of return on the initial investment.

c. Net present value.

d. Profitability index.

e. Time-adjusted rate of return. (Note: Estimate to the nearest percent.)