Answer Happy

The demand for some bikes a company sells is 10000 per year and they sell at a uniform rate throughout the year. The cost of one shipment of the bikes is $10000 and the cost of storing each bike is $200 per year, if the company orders too many bikes at once, the storage cost increases, and if the company orders the bikes too often the shipment cost increases. How large should each order be , and how often should the orders be placed, to minimize ordering and storage costs?