Cuddles, Inc. makes tiny stuffed bears. It cost them $6.00 to make and distribute these bears and they sell for $15.00. Any not sold by February 14 are sold for $2.00 (assume all remaining will be sold at this price). They know from previous years that the demand is approximately normally distributed with a mean of 20,000 bears and a standard deviation of 1500. Determine the number of bears to be made to balance the cost of lost sales and the cost of excess materials.