The consulting company Walker Lee \& Lewis (W L L) is in that never-ending budgeting phase of the year. Realizing that they couldn't defer a technology update any longer, the managers plan to replace all of the computers in the office. The old computers will be sold for market value. When the new computers reach the end of their useful lives, they will be sold as well. The cost of the combined new computers and annual software updates should be more than covered by efficiency gains and increased volume of sales-at least that's what the managers are expecting. Information related to this investment is as follows. Calculate the NPV of this investment. (Round present value factor calculations to 5 decimal places, e.g. 1.25124 and final answer to 2 decimal places e.g. 5,125.36. Enter negative amounts using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45).) NPV \$ Based on this NPV amount, is the IRR higher or lower than 6\%? The IRR than 6% Attempts: 1 of 2 used (b) X Your answer is incorrect. Calculate the IRR for this investment. (Round answer to 2 decimal places, e.g. 15.25\%.) IRR % Determine the simple payback period using (1) before-tax cash flows and (2) after-tax cash flows. (Round answers to 2 decimal places, e.g. 15.25.) Attempts: 0 of 2 used (d) Determine the discounted payback period using after-tax cash flows. (Round present value factor calculations to 5 decimal places, e.g. 1.25124 and final answer to 2 decimal places e.g. 5,125.36.) Discounted payback period Find the ARR. (Round answer to 1 decimal place, e.g. 15.2\%.) ARR % Attemp f) Calculate the profitability index for this investment. (Round answer to 2 decimal places, e.g. 15.25.) Profitability index