Anna and Joachim have been re-ordering kits to assemble nativity sets when the amount on hand is 40 kits and they routinely rurfout of kits. Demand is constant at a rate of 81 kits per week. Lead time varies with average lead time of 9 days and a standard deviation of 1.3 days.

1. at what point should they be ordering if they desire a stock at risk of 4%?
2. What would be their level of safety stock with the stock at risk?
3. At what point should they be ordering if they desire a stock at risk of 7.5%?
4. What would be their level of safety stock with that stock, our risk of 7.5%.
5. At what point should they be ordering if the time was confident and stable (no standard deviation)