QUESTION $4$ Etsy$$s & Company orders a particular type of Christmas decoration once a year. The purchasing price is $$6$ per unit. It costs $$2$ to hold one unit in stock and there is a shortage cost of $$10$ per unit. The demand density function is given by $()=$ & $1100),0<=<=1000,$ h Find the optimal order quantity if the amount on hand before an order is placed is $($i$)25$ units, $($ii$)50$ units.