Using the same data as in Question $2,$ namely monthly demand is $2000$ units, unit holding cost is $$5$ per unit per month and each order costs us $$200,$ assuming $12$ month per year and a purchase cost of $$10$ per unit, and additionally assuming that there are $250$ days per year, what is the optimal number of days between each order? Optimal Number of Orders$=$ D Q$^$ prime Optimal number of days between each order Number of Days During the Year Optimal Number of Orders $3\mathrm{.}204\mathrm{.}175\mathrm{.}156\mathrm{.}147\mathrm{.}12$