& Project A Project B 90,000 qsGoo 20,000 20,000 30,000 30,000 40,000 15,000 20,000 10,000 20,000 25,000 * rate of return to 5% # Acceptable payback period is 3 years @ payback A) Discound period payback period Net Present value profitability Index 4) Prefabbity Inden Index