Group Problem: Kanban System

A company using a Kanban system has an inefficient machine group. For example, the daily demand for part L$105$A is $3,000$ units. The average waiting time for a container of parts is $0\mathrm{.}8$ day. The processing time for a container of L$105$A is $0\mathrm{.}2$ day, and a container holds $270$ units. Currently, $20$ containers are used for this item.

a$.$ What is the value of the policy variable, $?$

b$.$ Suppose that the policy variable, $,$ was $0.$ How many containers would be needed now? What is the effect of the policy variable in this example?

$k=\frac{(\frac{?}{\text{b}\text{a}\text{r}}(d))((\frac{?}{\text{b}\text{a}\text{r}}())+(\frac{?}{\text{b}\text{a}\text{r}}(p)))(1+)}{c}$