$$11$ per unit per year The average ordering cost is $$31$ per order It takes about $5$ days for an order to arrive, and the demand for $1$ week is $120$ units $($This is a corporate operation, and there are $250$ working days per year$).$

a$)$ What is the EOQ? $183\mathrm{.}90$ units $($round your response to two decimal places$)$

b$)$ What is the average inventory if the EOQ is used? $9195$ units $($round your response to two decimal places$)$

c$)$ What is the optimal number of orders per year? $3263$ orders $($round your response to two decimal places$)$

d$)$ What is the optimal number of days in between any two orders? days $($round your response to two decimal places$)$