Problem:
The local supermarket buys lettuce each day to ensure really fresh produce. Each morning any lettuce that is left from the previous day is sold to a dealer that resells it to farmers who use it to feed their animals. This week the supermarket can buy fresh lettuce for $5.00 a box. The lettuce is sold for $15.00 a box and the dealer that sells old lettuce is willing to pay $1.60 a box. Past history says that tomorrow's demand for lettuce averages 240 boxes with a standard deviation of 36 boxes.
Required:
1. How many boxes of lettuce should the supermarket purchase tomorrow