You are considering setting up a booth at a street fair in a town not far from where you are located. Any sale you make will be a one-time sale. There is only a 50 percent chance that you will collect your money on a credit sale. The product you want to sell has a variable cost of $3.90 and a sales price of $5.00. The monthly interest rate is 1.5 percent. Should you offer people 30 days to pay? Why or why not?