At Dot$$ Com, a large retailer of popular$$ books, demand is constant at $17,000$ books per year. The cost of placing an order to replenish stock is $$$$5$ and the annual cost of holding is $$5\mathrm{.}00$ per book. Stock is received $15$ working days after an order has been placed. No backordering is allowed. Assume $350$ working days a year.

Dot$$ Com's optimal order quantity is $\_\_$ books. $($Enter your response rounded to the nearest whole$$ number.$)$