Stephanie Robbins is attempting to perform an inventory analysis on one of her most popular products. Annual demand for this product is 5,000 units: carrying cost is $50 per unit per year: order costs for her company typically run nearly $30 per order, and lead time averages 10 days (Assume 250 working days per year.) a) The economic order quantity is __ units (round your response to the nearest whole number). b) The average inventory is units __ (round your response to the nearest whole number). c) The optimal number of orders per year is __ orders (round your response to the nearest whole number.) d) The optimal number of working days between orders is __ days (round your response to two decimal places). e) The total annual inventory cost (carrying + cost ordering cost) $ __ (round your response to two decimal places). f) The reorder point is __ units (enter your response as a whole number).