Q$2-$ Bell Computers purchases integrated chips at $$350$ per chip. The ordering cost is $$120$ per order,Q$2-$ Bell Computers purchases integrated chips at $$350$ per chip. The ordering cost is $$120$ per order,

and sales are $400$ per month. The company's supplier, Rich Blue Chip Manufacturing, Inc., decides to

offer price concessions in order to attract larger orders. The price structure is shown below:

a$.$ What is the optimal order quantity and the minimum annual cost for Bell Computers to order,

purchase, and hold these integrated ships if carrying costs are $10\%$ of purchasing price per unit on

an annual basis?

b$.$ What is the optimal order quantity and the optimal annual total cost if the holding cost is fixed at

$$35$ per unit per year?