Rafael turns to Michelle and asks, $$What order quantity do you recommend we use for this product? Remember, we only ship in case quantities.$$

To determine the order quantity for Listerine Cool Mint $250$ ml$,$ we need to consider the economic order quantity $($EOQ$)$ formula:

Economic Order Quantity $=$ sqrt $(2$ x demand x ordering cost$)=$ holding cost x $2$ demand x ordering Cost$)$

We need to calculate the demand for one year:

The average weekly sales $=12\mathrm{.}3$ units

No$.$ of weeks in a year $=52$

Annual demand $=$Average weekly sales $$ Number of weeks in a year$=12\mathrm{.}3\backslash$times $52=639\mathrm{.}6$

EOQ$=2$ x $639\mathrm{.}6$ x $$6/0\mathrm{.}25$ x $$2\mathrm{.}50=110\mathrm{.}82$

Demand $=639\mathrm{.}6$ units

Ordering Cost$=$ $$6$

Holding Cost$=$$$2\mathrm{.}50$

$2$ x $639\mathrm{.}6$ x $62\mathrm{.}50=2,502$x$639\mathrm{.}6$x$6$

$3837\mathrm{.}62\mathrm{.}50=2\mathrm{.}503837\mathrm{.}6$

$1535\mathrm{.}04=1535\mathrm{.}04$

$39\mathrm{.}18$

Listerine Cool Mint $250$ ml is $39\mathrm{.}18$ units,