1. Clarity Manufacturing needs 600,000 units of shafts for its production of golf clubs per year. The carrying costs of these tires are $15 per unit per year and the fixed ordering cost is $900. a What is the optimal number of units Clarity Manufacturing should order each time in order to minimize total inventory cost? (4 points) b. How often (approximately every how many days) should Clarity Manufacturing order the inventory of shafts? Assume a 365-day year. (4 points) C. What is the annual carrying/holding cost at this optimal order quantity? (2 points)