Each day the manager of a local bookstore must decide how many copies of the community newspaper to order for sale in her shop. She pays the newspaper’s publisher $0.40 for each copy and sells the newspapers to local residents for $0.50 each. Newspapers that are unsold at the end of day are considered worthless. The probability distribution of the number of copies of the newspaper purchased daily at her shop is provided in Table 7.14. Employ a decision tree to find the book store manager’s profit-maximizing daily order quantity. 

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TABLE 7.14 Distribution of Daily Local Newspaper Demand Daily Demand for Local Newspaper 10 11 12 13 14 15 Probability 0.10 0.15 0.30 0.20 0.15 0.10