A drugstore uses fixed$-$order cycles for many of the items it stocks. The manager wants a service level of $\mathrm{.}90.$ The order interval is $13$ days, and lead time is $1$ days. Average demand for one item is $64$ units per day, and the standard deviation of demand is $7$ units per day. Given the on$-$hand inventory at the reorder time for each order cycle shown in the following table.

Use Table.

Cycle On Hand

$139$

$211$

$394$