The Metropolitan Book Company purchases paper from the Atlantic Paper Company. Metropolitan produced magazines and paperbacks that require $1,215,000 square years of paper per year. The cost per order for the company is $1,200; the cost of holding one square yard of paper in inventory is $.08 per year. Determine the following:

1. a) Economic order quantity
2. b) Minimum total annual cost
3. c) Optimal number of orders per year
4. d) Optimal time between orders