Consider a basic economic order quantity (EOQ) model with the following characteristics: Item cost: $15 Item selling price: $20 Monthly demand: 500 units (constant) Annual holding cost: 9% of purchase cost Cost per order: $18 Order lead time: 5 days Firm's work year: 300 days (50 weeks @ 6 days per week) Safety stock: 15% of monthly demand The optimal Order Quantity, Q* is