Demand for organic super fresh lettuce in a local super market is shown below. Cumulative Demand Probability probability 5 0.1 0.1 6 0.6 0.7 7 0.1 0.8 8 0.2 1.0 Unsold lettuce are given to a food bank with a salvage value of $1.00 per lettuce. Cost of the lettuce is $3:00 per unit. Selling price is $6:00 per unit. Using single period model (discrete demarsd), what is the optimal order quantity in number of units of lettuce the super market should use? 06 09 05 OB 07