an investor has 2 choices. To purchase a market stall for $60,000 which is expected to generate $14,000 profit per year for 5 years with residual value of $20,000 or purchase a website solution for $30,000 also expected to generate $10,000 for 5 years with no residual value. Calculate the net present value of each option and advise the investor carefully. What would be the minimum resale value after 5 years to convince the retailer to purchase the market stall?