(All answers were generated using 1,000 trials and native Excel functionality.) for the purchase cost, the labor cost, and the transportation cost are estimated as follows: (a) Construct a simulation model to estimate the average profit per unit. What is a 95% confidence interval around this average? Round your answers to two decimal places. Lower Bound: $ Upper Bound: $ 95% confidence interval around this proportion? Round your answers to one decimal of a percentage. Lower Bound: % Upper Bound: %