based on the table calculate using a) Present worth b) AW c)FW d)IRR and select the best alternative

6-7. Three mutually exclusive design alternatives are being considered. The estimated cash flows for each alternative are given next. The MARR is 20% per year. At the conclusion of the useful life, the investment will be sold. A B Investment cost $28,000 $55,000 $40,000 Annual expenses $15,000 $13,000 $22,000 Annual revenues $23,000 $23,000 $28,000 $32,000 Market value $6,000 $8,000 $10,000 Useful life 10 years 10 years 10 years IRR 26.4% 24.7% 22.4%