*** Please provide solution, formula, and calculation The shopping center manager must set up an inventory ordering procedure for two items (1) hand sanitizer (2) paper towels Hand sanitizer can be ordered anytime, and paper towels must be ordered every four weeks. The weekly usage rate for each item follows Normal distribution. The manager wants to plan for 50 weeks a year and has gathered the following information about two items: Hand Sanitizer Paper Towels Average weekly demand (box) 60 70 Standard deviation (per week) 4 15 Unit cost $15 $20 Annual holding cost (rate of unit cost) 30% 30% Ordering cost per order $70 $30 Lead time (week) 2 2 Acceptable stock-out risk 2.50% 2.50% a. At what inventory level should the manager reorder hand sanitizer? b. Calculate the economic order quantity for hand sanitizer. c. Calculate the order quantity for paper towels if 110 units are on hand when the order is placed