Southeastern Bell stocks a certain switch connector at its central warehouse for supplying

field service offices. The yearly demand for these connectors is $15,000$ units. Southeastern estimates its

annual holding cost for this item to be $$25$ per unit. The cost to place and process an order from the

supplier is $$75.$ The company operates $300$ days per year and the lead time to receive an order from the

supplier is $3$ working days.

a$)$ Find the economic order quantity.

b$)$ Find the annual holding costs.

c$)$ Find the annual ordering costs.

d$)$ What is the reorder point?