can someone please help me with problems 1 and 2? I can't find this chapter in the book. Any help with detailed steps would be much appreciated as I would like to understand the steps to solve future problems similar to this one. Thank you!

1. (Inventory Management) An online cell phone retailer's annual holding cost percentage is 20%. The retailer operates with a days-of-supply of 10 days and assume there are 365 days per year. What is the inventory holding cost for a cell phone that the retailer purchased for $100 2. (SCM) Paris bakery requires, on average, 1,800 tons of flour each week, with a standard deviation of 500 tons. The lead time to receive its orders is 3 weeks. The holding cost for one ton of flour for one week is $8. It operates with a 97.98% in-stock probability. What would be its average holding cost per week? 3. (EOQ) Kim's bakery makes biscuits. The bakery needs 50 kg of flour per day, on average. The supplier charges a $3 per kg and a $30 delivery fee per order (which is independent of the order size) and Kim's annual holding cost percentage is 15%. Assume the bakery operates and sells five days per week, 52 weeks per year. a) If Kim's bakery wants to minimize its annual ordering and inventory holding costs, how much flour should it purchase with each order (in kg)? b) It is offered a 5 percent discount if Kim's bakery purchases 500 kg of flour at a time. If Kim's bakery wants to purchase 500 kg per order, what would be its annual sum of the ordering and holding costs