Consider the following cash flows: Year Cash Flow 0 $ 34,000 1 14,600 2 17,100 3 12,000 What is the NPV at a discount rate of 18 percent? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Net present value $ What is the NPV at a discount rate of 28 percent? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) Net present value $