M$.$ Cotteleer Electronics supplies microcomputer circuitry to a company that incorporates microprocessors into refrigerators and other home appliances. One of the components has an annual demand of

$265$

units, and this is constant throughout the year. Carrying cost is estimated to be

$$0\mathrm{.}25$

per unit per year, and the ordering $($setup$)$ cost is

$$21$

per order.

Part $2$

a$)$ To minimize cost, how many units should be ordered each time an order is placed?

enter your response here

units $($round your response to two decimal places$).$