the kiosk sells spicy black bean burritos during the weekday lunch hour. it charges $6.00 for each burrito and all burritos are made before the lunch crowd arrives. the burritos cost the kiosk $1.75. kiosk management is very sensitive about the quality of food it serves. thus, it maintains a strict "no old burrito" policy, so any burritos left at the end of the day are disposed of. burrito demand follows a normal distribution with a mean of 200 and a standard deviation of 40.