Review Figure 3 that shows the cash flows estimated before and after Katrina. Calculate the NPV of cash flows for each stream of cash before and after Katrina using a discount rate of 9%. Remember that Figure 3 uses monthly cash flows and the discount rate is an annual rate. Use the following format (only part of Figure 3 is shown below). Old Sales Estimate Old NPV of cash flow New Sales Estimate New NPV of cash flow Date for PowrFlo 500 (units) sales price of $499.00 for PowrFlo 500 (units) sales price of $499.00 Oct-05 350 Calculate this 2700 Calculate this