The monthly demand for garlic sold by the Sighisoara Softneck Garlic Cooperative is known to be normally distributed with a mean of 11640 bulbs and a standard deviation of 279 bulbs. How many bulbs must the Cooperative have in stock at the start of the month in order that there be only a 5% chance of running out of stock by the end of the month. [You may assume that no further supplies of garlic are available during the month.]
