7- A department store has a one-time opportunity to purchase a special style of bedroom quilt, which has holiday decorations on it, for $56.00 each. The store plans to offer the quilt to customers at a retail price of $79.00 during the season. Any quilts left over after the holidays will be sold for $38.50. It is estimated that demand for this item at this store location will have a normal probability distribution with a mean of 70 and a standard deviation of 20. How many quilts should the store stock?