Given the following information, formulate an inventory management system. The item is demanded 50 weeks a year. PARAMETER Item cost Order cost Annual holding cost Annual demand Average weekly demand VALUE $12.00 $250.00/order 20% of item cost. Standard deviation of weekly demand Lead time Service probability 22,700 units 454/week 20 units 1 week 90% a. Determine the order quantity and reorder point. (Use Excel's NORMSINV() function to find your z-value and then round that z-" value to 2 decimal places. Do not round any other intermediate calculations. Round your final answers to the nearest whole number.) Optimal order quantity Reorder point units units b. Determine the annual holding and order costs. (Do not round any intermediate calculations. Round your final answers to 2 decimal places.) Holding cost Ordering cost