5. compute the pay-back period given an investment of $ 190,000 and even cash flows of $ 30,000 per year. 6. compute the pay-back period given an investment of $ 247,000 and cash flow inflows of $ 73,000, 63,000, 64,000 and 52,000. annual cumulative year o year 1 year 2 year 3 year 4 7. compute the net present value of an investment of $ 345,000 with cash inflows of $ 168,000, 58,000, 62,000, 36,000 and 26,000. px $1 at 9%.917,.842,772,.708,.650. 1 2 3 4 5