$1.$ Weekly demand for laptops at a computer retail store is normally distributed with a mean of $500$ and a standard deviation of $220.$ The supplier takes two weeks to supply a retail store order. The store manager is considering following a periodic review policy to manage inventory of laptops. She plans to order every three weeks. If the store manager wants to keep its $97$ percent cycle service level, how much safety inventory should the store carry? What should be its base$-$stock level be$?$ Note. You can use the Periodic Review Excel spreadsheet. In this case, please provide a screenshot of your inputs and results from the spreadsheet.