Use the following problem statement to answer questions $1-6$ Alex wants to determine the best order quantity for mechanical pencils. He buys the mechanical pencils from a wholesaler. The wholesaler offers discounts for large orders. He expects an annual demand of $2,500$ units. It costs $ $11$ to place an order. The annual cost of holding a unit in stock is $30$ percent of the unit's price. The price schedule that the wholesaler offers is shown in the table below. Answer the following questions. Round to four decimal places.