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 $270$ units, and this is constant throughout the year. Carrying cost is estimated to be $$1\mathrm{.}00$ per unit per year, and the

ordering $($setup$)$ cost is $$19$ per order.

a$)$ To minimize cost, how many units should be ordered each time an order is placed? units $($round your response to two decimal places$).$