PLEASE DOUBLE CHECK UR WORK BEFORE ANSWERING ALL 5 OF MY LAST QUESTIONS WERE ANSWERED INCORRECTLY:((((( And make the answer clear

The University Bookstore at a prestigious private university buys mechanical pencils from a wholesaler. The wholesaler offers discounts for large orders according to the following price schedule: The bookstore expects an annual demand of 2,600 units. It costs $10 to place an order, and the annual cost of holding a unit in stock is 30 percent of the units price. Determine the best order quantity. The best order quantity is units. (Enter your response rounded to the nearest whole number)