The local cooperative supply company stocks a vitamin/mineral premix for a specialized poultry feed. This premix has a demand of 500 units per year and a cost of $25 per unit. The carrying charge is 20 percent per unit and the ordering cost is $15 per order. Assume 250 days of operation per year.

1. What is the economic order quantity (EOQ) for this item?
2. How often will the dealer reorder this premix if the lead time for order is 12 days?
3. What is the annual ordering, carrying cost and combined annual ordering and holding cost of the premix?