I need help, please

Aventis is a major manufacturer of the flu (influenza) vaccine in the U.S. Aventis manufactures the vaccine before the flu season at a cost of $10 per dose (a "dose" is vaccine for one person). During the flu season Aventis sells doses to distributors and to health-care providers for $25. However, sometimes the flu season is mild and not all doses are sold - if a dose is not sold during the season then it is worthless and must be thrown out. Aventis anticipates demand for next flu season to follow a normal distrituion with a mean of 60 million units and a standard deviation of 15 million units. Which one of the following is CORRECT? Multiple Choice O Aventis should order more than 75 million units. O Aventis should order more than 60 million units. O Aventis should order more than 67.5 million units. O Aventis should order more than 82.5 million units