A small company manufactures an electronic device used for aircraft

navigation systems. The demand is based on contracted orders

for aircraft and is known and uniform at the rate of $6,400$ units

annually. A voltmeter used forthis device can be produced

internally at the rate of $128$ units per day. There are $250$ working

days for production each year. The setup cost for each

production run is $$24,$ and inventory holding cost is $$3$ per unit

per year.