Newspapers are perishable products. Every day any newspaper that is left is sold to an insulation company. A newsboy can buy a newspaper for $4.00. The newspaper can be then sold for $10.00 and the insulation company is happy to pay $1.50 for a copy of outdated newspaper. Historical data show that the demand for the newspaper is 250 copies on average. The standard deviation shown in historical data is 34 copies. What is the optimal ordering quantity? Select one: a. 221 b. 232 c. 250 d. 268 e. 271.