A small copy center uses $4450-$sheet boxes of copy paper a week. Experience suggests that usage can be well approximated by a

normal distribution with a mean of $4$boxes per week and a standard deviation of $60$ box per week. $3$ weeks are required to fill an order

for letterhead stationery. Ordering cost is $$6,$ and annual holding cost is $33$ cents per box.

Use Table.

a$.$ Determine the economic order quantity, assuming a $52-$week year.

Note: Round your answer to the nearest whole number.

Answer is complete and correct.

EOQ

boxes

b$.$ If the copy center reorders when the supply on hand is $13$ boxes, compute the risk of a stockout.

Note: Round $"z"$ value to $2$ decimal places and final answer to $4$ decimal places.

Answer is complete but not entirely correct.

Risk