The daily sales of a peanut butter at Power's Grocery are normally distributed, with a mean of 12 jars and a standard deviation of 4. The manager checks the inventories on shelves and places an order...

The daily sales of a peanut butter at Power's Grocery are normally distributed, with a mean of

12 jars and a standard deviation of 4. The manager checks the inventories on shelves and places an order every three days. Delivery lead time is two days.

How much safety stock of peanut butter should they have for a 99% service level?

If there are four jars on the shelf when an order is placed, how much should the store order?