$11$me left

$)$: Suppose the weekly demand for an item is approximately normal with the distribution of $DN(68,{16}^2)$ units over a $50-$week operating year. The company pays $$4\mathrm{.}2$ for each unit and sells each for $$12\mathrm{.}5.$ In addition, they estimate that the annual holding cost is $25$ percent of the unit's cost. Finally, the supplier contract states there is a cost of $$71\mathrm{.}4$ to place an order $($largely managerial and clerical costs$).$ Assume a nine$-$week lead time.

What is the distribution of the demand during lead time?

a$.N(612,2304)$

b$.N(612,48)$

c$.N(675,15)$

d$.N(675,225)$

Consider the distribution of the demand during lead time from question seven. What is the chance of the demand level during lead time exceeding $626$ units?

a$.16$ percentWhat is the holding cost, h $?$

Time left $1$:$29$:$41$

a$.$ $$1\mathrm{.}05$

b$.$ $$0\mathrm{.}90$

C$.$ $$0\mathrm{.}55$

d$.$ $$1\mathrm{.}20$

What is the average annual demand, $?$

a$.3400$ parts

b$.2304$ parts

c$.612$ parts

d$.800$ parts

What is the economic $($optimal$)$ order quantity, EOQ?

a$.261$ parts

b$.550$ parts