Sharp, Inc. a company that markets painless hypodermic needles to hospitals, would like to reduce the inventory cost by determining the optimal number of needles to obtain per order. The annual demand is 1,000 units; the ordering cost is $10 per order and the holding cost per unit per year is $.50. Calcualte the optimal number of units per order. Then calculate the total cost (storage + order cost). How to input this question into excel?