If the annual demand of one product is (6000) units a year. Ordering cost is the following offer:

(40) JD per order. Holding cost is (40%) of unit price. The company received

Determine:

• The optimal order quantity
• The total cost of the optimal order quantity
• The minimum total cost
• The length of time between orders (lead time) in days if the company is working (240) days a year.

\begin{tabular}{|c|c|} \hline Quantity (units) & Price (JD) \\ \hline 1599 & 2 \\ \hline 6001199 & 1.8 \\ \hline 12001799 & 1.6 \\ \hline 1800 and over & 1.4 \\ \hline \end{tabular}